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<?php
namespace Kirby\Toolkit;
use Exception;
/**
* The String class provides a set
* of handy methods for string
* handling and manipulation.
*
* @package Kirby Toolkit
* @author Bastian Allgeier <bastian@getkirby.com>
* @link https://getkirby.com
* @copyright Bastian Allgeier GmbH
* @license https://opensource.org/licenses/MIT
*/
class Str
{
/**
* Language translation table
*
* @var array
*/
public static $language = [];
/**
* Ascii translation table
*
* @var array
*/
public static $ascii = [
'/°|₀/' => '0',
'/¹|₁/' => '1',
'/²|₂/' => '2',
'/³|₃/' => '3',
'/⁴|₄/' => '4',
'/⁵|₅/' => '5',
'/⁶|₆/' => '6',
'/⁷|₇/' => '7',
'/⁸|₈/' => '8',
'/⁹|₉/' => '9',
'/À|Á|Â|Ã|Å|Ǻ|Ā|Ă|Ą|Ǎ|Ä|A/' => 'A',
'/à|á|â|ã|å|ǻ|ā|ă|ą|ǎ|ª|æ|ǽ|ä|a|а/' => 'a',
'/Б/' => 'B',
'/б/' => 'b',
'/Ç|Ć|Ĉ|Ċ|Č|Ц/' => 'C',
'/ç|ć|ĉ|ċ|č|ц/' => 'c',
'/Ð|Ď|Đ/' => 'Dj',
'/ð|ď|đ/' => 'dj',
'/Д/' => 'D',
'/д/' => 'd',
'/È|É|Ê|Ë|Ē|Ĕ|Ė|Ę|Ě|Е|Ё|Э/' => 'E',
'/è|é|ê|ë|ē|ĕ|ė|ę|ě|е|ё|э/' => 'e',
'/Ф/' => 'F',
'/ƒ|ф/' => 'f',
'/Ĝ|Ğ|Ġ|Ģ|Г/' => 'G',
'/ĝ|ğ|ġ|ģ|г/' => 'g',
'/Ĥ|Ħ|Х/' => 'H',
'/ĥ|ħ|х/' => 'h',
'/Ì|Í|Î|Ï|Ĩ|Ī|Ĭ|Ǐ|Į|İ|И/' => 'I',
'/ì|í|î|ï|ĩ|ī|ĭ|ǐ|į|ı|и|i̇/' => 'i',
'/Ĵ|Й/' => 'J',
'/ĵ|й/' => 'j',
'/Ķ|К/' => 'K',
'/ķ|к/' => 'k',
'/Ĺ|Ļ|Ľ|Ŀ|Ł|Л/' => 'L',
'/ĺ|ļ|ľ|ŀ|ł|л/' => 'l',
'/М/' => 'M',
'/м/' => 'm',
'/Ñ|Ń|Ņ|Ň|Н/' => 'N',
'/ñ|ń|ņ|ň|ʼn|н/' => 'n',
'/Ò|Ó|Ô|Õ|Ō|Ŏ|Ǒ|Ő|Ơ|Ø|Ǿ|Ö|O/' => 'O',
'/ò|ó|ô|õ|ō|ŏ|ǒ|ő|ơ|ø|ǿ|º|ö|o|о/' => 'o',
'/П/' => 'P',
'/п/' => 'p',
'/Ŕ|Ŗ|Ř|Р/' => 'R',
'/ŕ|ŗ|ř|р/' => 'r',
'/Ś|Ŝ|Ş|Ș|Š|С/' => 'S',
'/ś|ŝ|ş|ș|š|ſ|с/' => 's',
'/Ţ|Ț|Ť|Ŧ|Т/' => 'T',
'/ţ|ț|ť|ŧ|т/' => 't',
'/Ù|Ú|Û|Ũ|Ū|Ŭ|Ů|Ű|Ų|Ư|Ǔ|Ǖ|Ǘ|Ǚ|Ǜ|У|Ü|U/' => 'U',
'/ù|ú|û|ũ|ū|ŭ|ů|ű|ų|ư|ǔ|ǖ|ǘ|ǚ|ǜ|у|ü|u/' => 'u',
'/В/' => 'V',
'/в/' => 'v',
'/Ý|Ÿ|Ŷ|Ы/' => 'Y',
'/ý|ÿ|ŷ|ы/' => 'y',
'/Ŵ/' => 'W',
'/ŵ/' => 'w',
'/Ź|Ż|Ž|З/' => 'Z',
'/ź|ż|ž|з/' => 'z',
'/Æ|Ǽ/' => 'AE',
'/ß/' => 'ss',
'/IJ/' => 'IJ',
'/ij/' => 'ij',
'/Œ/' => 'OE',
'/Ч/' => 'Ch',
'/ч/' => 'ch',
'/Ю/' => 'Ju',
'/ю/' => 'ju',
'/Я/' => 'Ja',
'/я/' => 'ja',
'/Ш/' => 'Sh',
'/ш/' => 'sh',
'/Щ/' => 'Shch',
'/щ/' => 'shch',
'/Ж/' => 'Zh',
'/ж/' => 'zh',
];
/**
* Default settings for class methods
*
* @var array
*/
public static $defaults = [
'slug' => [
'separator' => '-',
'allowed' => 'a-z0-9'
]
];
/**
* Parse accepted values and their quality from an
* accept string like an Accept or Accept-Language header
*
* @param string $input
* @return array
*/
public static function accepted(string $input): array
{
$items = [];
// check each type in the Accept header
foreach (static::split($input, ',') as $item) {
$parts = static::split($item, ';');
$value = A::first($parts); // $parts now only contains params
$quality = 1;
// check for the q param ("quality" of the type)
foreach ($parts as $param) {
$param = static::split($param, '=');
if (A::get($param, 0) === 'q' && !empty($param[1])) {
$quality = $param[1];
}
}
$items[$quality][] = $value;
}
// sort items by quality
krsort($items);
$result = [];
foreach ($items as $quality => $values) {
foreach ($values as $value) {
$result[] = [
'quality' => $quality,
'value' => $value
];
}
}
return $result;
}
/**
* Returns the rest of the string after the given character
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return string
*/
public static function after(string $string, string $needle, bool $caseInsensitive = false): string
{
$position = static::position($string, $needle, $caseInsensitive);
if ($position === false) {
return false;
} else {
return static::substr($string, $position + static::length($needle));
}
}
/**
* Convert a string to 7-bit ASCII.
*
* @param string $string
* @return string
*/
public static function ascii(string $string): string
{
$string = str_replace(
array_keys(static::$language),
array_values(static::$language),
$string
);
$string = preg_replace(
array_keys(static::$ascii),
array_values(static::$ascii),
$string
);
return preg_replace('/[^\x09\x0A\x0D\x20-\x7E]/', '', $string);
}
/**
* Returns the beginning of a string before the given character
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return string
*/
public static function before(string $string, string $needle, bool $caseInsensitive = false): string
{
$position = static::position($string, $needle, $caseInsensitive);
if ($position === false) {
return false;
} else {
return static::substr($string, 0, $position);
}
}
/**
* Returns everything between two strings from the first occurrence of a given string
*
* @param string $string
* @param string $start
* @param string $end
* @return string
*/
public static function between(string $string = null, string $start, string $end): string
{
return static::before(static::after($string, $start), $end);
}
/**
* Checks if a str contains another string
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return bool
*/
public static function contains(string $string = null, string $needle, bool $caseInsensitive = false): bool
{
return call_user_func($caseInsensitive === true ? 'stristr' : 'strstr', $string, $needle) !== false;
}
/**
* Converts a string to a different encoding
*
* @param string $string
* @param string $targetEncoding
* @param string $sourceEncoding (optional)
* @return string
*/
public static function convert($string, $targetEncoding, $sourceEncoding = null)
{
// detect the source encoding if not passed as third argument
if ($sourceEncoding === null) {
$sourceEncoding = static::encoding($string);
}
// no need to convert if the target encoding is the same
if (strtolower($sourceEncoding) === strtolower($targetEncoding)) {
return $string;
}
return iconv($sourceEncoding, $targetEncoding, $string);
}
/**
* Encode a string (used for email addresses)
*
* @param string $string
* @return string
*/
public static function encode(string $string): string
{
$encoded = '';
for ($i = 0; $i < static::length($string); $i++) {
$char = static::substr($string, $i, 1);
list(, $code) = unpack('N', mb_convert_encoding($char, 'UCS-4BE', 'UTF-8'));
$encoded .= rand(1, 2) == 1 ? '&#' . $code . ';' : '&#x' . dechex($code) . ';';
}
return $encoded;
}
/**
* Tries to detect the string encoding
*
* @param string $string
* @return string
*/
public static function encoding(string $string): string
{
return mb_detect_encoding($string, 'UTF-8, ISO-8859-1, windows-1251', true);
}
/**
* Checks if a string ends with the passed needle
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return bool
*/
public static function endsWith(string $string, string $needle, bool $caseInsensitive = false): bool
{
if ($needle === '') {
return true;
}
$probe = static::substr($string, -static::length($needle));
if ($caseInsensitive === true) {
$needle = static::lower($needle);
$probe = static::lower($probe);
}
return $needle === $probe;
}
/**
* Creates an excerpt of a string
* It removes all html tags first and then cuts the string
* according to the specified number of chars.
*
* @param string $string The string to be shortened
* @param int $chars The final number of characters the string should have
* @param bool $strip True: remove the HTML tags from the string first
* @param string $rep The element, which should be added if the string is too long. Ellipsis is the default.
* @return string The shortened string
*/
public static function excerpt($string, $chars = 140, $strip = true, $rep = '')
{
if ($strip === true) {
$string = strip_tags(str_replace('<', ' <', $string));
}
// replace line breaks with spaces
$string = str_replace(PHP_EOL, ' ', trim($string));
// remove double spaces
$string = preg_replace('![ ]{2,}!', ' ', $string);
if ($chars === 0) {
return $string;
}
if (static::length($string) <= $chars) {
return $string;
}
return static::substr($string, 0, strrpos(static::substr($string, 0, $chars), ' ')) . ' ' . $rep;
}
/**
* Convert the value to a float with a decimal
* point, no matter what the locale setting is
*
* @param string|int|float $value
* @return string
*/
public static function float($value): string
{
$value = str_replace(',', '.', $value);
$decimal = strlen(substr(strrchr($value, '.'), 1));
return number_format((float)$value, $decimal, '.', false);
}
/**
* Returns the rest of the string starting from the given character
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return string
*/
public static function from(string $string, string $needle, bool $caseInsensitive = false): string
{
$position = static::position($string, $needle, $caseInsensitive);
if ($position === false) {
return false;
} else {
return static::substr($string, $position);
}
}
/**
* Checks if the given string is a URL
*
* @param string|null $string
* @return bool
*/
public static function isURL(string $string = null): bool
{
return filter_var($string, FILTER_VALIDATE_URL);
}
/**
* Convert a string to kebab case.
*
* @param string $value
* @return string
*/
public static function kebab(string $value = null): string
{
return static::snake($value, '-');
}
/**
* A UTF-8 safe version of strlen()
*
* @param string $string
* @return int
*/
public static function length(string $string = null): int
{
return mb_strlen($string, 'UTF-8');
}
/**
* A UTF-8 safe version of strtolower()
*
* @param string $string
* @return string
*/
public static function lower(string $string = null): string
{
return mb_strtolower($string, 'UTF-8');
}
/**
* Safe ltrim alternative
*
* @param string $string
* @param string $trim
* @return string
*/
public static function ltrim(string $string, string $trim = ' '): string
{
return preg_replace('!^(' . preg_quote($trim) . ')+!', '', $string);
}
/**
* Get a character pool with various possible combinations
*
* @param string|array $type
* @param bool $array
* @return string|array
*/
public static function pool($type, bool $array = true)
{
$pool = [];
if (is_array($type) === true) {
foreach ($type as $t) {
$pool = array_merge($pool, static::pool($t));
}
return $pool;
} else {
switch ($type) {
case 'alphaLower':
$pool = range('a', 'z');
break;
case 'alphaUpper':
$pool = range('A', 'Z');
break;
case 'alpha':
$pool = static::pool(['alphaLower', 'alphaUpper']);
break;
case 'num':
$pool = range(0, 9);
break;
case 'alphaNum':
$pool = static::pool(['alpha', 'num']);
break;
}
}
return $array ? $pool : implode('', $pool);
}
/**
* Returns the position of a needle in a string
* if it can be found
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return int|bool
*/
public static function position(string $string = null, string $needle, bool $caseInsensitive = false)
{
if ($caseInsensitive === true) {
$string = static::lower($string);
$needle = static::lower($needle);
}
return mb_strpos($string, $needle, 0, 'UTF-8');
}
/**
* Runs a string query.
* Check out the Query class for more information.
*
* @param string $query
* @param array $data
* @return string|null
*/
public static function query(string $query, array $data = [])
{
return (new Query($query, $data))->result();
}
/**
* Generates a random string that may be used for cryptographic purposes
*
* @param int $length The length of the random string
* @param string $type Pool type (type of allowed characters)
* @return string
*/
public static function random(int $length = null, string $type = 'alphaNum')
{
if ($length === null) {
$length = random_int(5, 10);
}
$pool = static::pool($type, false);
// catch invalid pools
if (!$pool) {
return false;
}
// regex that matches all characters *not* in the pool of allowed characters
$regex = '/[^' . $pool . ']/';
// collect characters until we have our required length
$result = '';
while (($currentLength = strlen($result)) < $length) {
$missing = $length - $currentLength;
$bytes = random_bytes($missing);
$result .= substr(preg_replace($regex, '', base64_encode($bytes)), 0, $missing);
}
return $result;
}
/**
* Replaces all or some occurrences of the search string with the replacement string
* Extension of the str_replace() function in PHP with an additional $limit parameter
*
* @param string|array $string String being replaced on (haystack);
* can be an array of multiple subject strings
* @param string|array $search Value being searched for (needle)
* @param string|array $replace Value to replace matches with
* @param int|array $limit Maximum possible replacements for each search value;
* multiple limits for each search value are supported;
* defaults to no limit
* @return string|array String with replaced values;
* if $string is an array, array of strings
*/
public static function replace($string, $search, $replace, $limit = -1)
{
// convert Kirby collections to arrays
if (is_a($string, 'Kirby\Toolkit\Collection') === true) {
$string = $string->toArray();
}
if (is_a($search, 'Kirby\Toolkit\Collection') === true) {
$search = $search->toArray();
}
if (is_a($replace, 'Kirby\Toolkit\Collection') === true) {
$replace = $replace->toArray();
}
// without a limit we might as well use the built-in function
if ($limit === -1) {
return str_replace($search, $replace, $string);
}
// if the limit is zero, the result will be no replacements at all
if ($limit === 0) {
return $string;
}
// multiple subjects are run separately through this method
if (is_array($string) === true) {
$result = [];
foreach ($string as $s) {
$result[] = static::replace($s, $search, $replace, $limit);
}
return $result;
}
// build an array of replacements
// we don't use an associative array because otherwise you couldn't
// replace the same string with different replacements
$replacements = static::replacements($search, $replace, $limit);
// run the string and the replacement array through the replacer
return static::replaceReplacements($string, $replacements);
}
/**
* Generates a replacement array out of dynamic input data
* Used for Str::replace()
*
* @param string|array $search Value being searched for (needle)
* @param string|array $replace Value to replace matches with
* @param int|array $limit Maximum possible replacements for each search value;
* multiple limits for each search value are supported;
* defaults to no limit
* @return array List of replacement arrays, each with a
* 'search', 'replace' and 'limit' attribute
*/
public static function replacements($search, $replace, $limit): array
{
$replacements = [];
if (is_array($search) === true && is_array($replace) === true) {
foreach ($search as $i => $s) {
// replace with an empty string if no replacement string was defined for this index;
// behavior is identical to the official PHP str_replace()
$r = $replace[$i] ?? '';
if (is_array($limit) === true) {
// don't apply a limit if no limit was defined for this index
$l = $limit[$i] ?? -1;
} else {
$l = $limit;
}
$replacements[] = ['search' => $s, 'replace' => $r, 'limit' => $l];
}
} elseif (is_array($search) === true && is_string($replace) === true) {
foreach ($search as $i => $s) {
if (is_array($limit) === true) {
// don't apply a limit if no limit was defined for this index
$l = $limit[$i] ?? -1;
} else {
$l = $limit;
}
$replacements[] = ['search' => $s, 'replace' => $replace, 'limit' => $l];
}
} elseif (is_string($search) === true && is_string($replace) === true && is_int($limit) === true) {
$replacements[] = compact('search', 'replace', 'limit');
} else {
throw new Exception('Invalid combination of $search, $replace and $limit params.');
}
return $replacements;
}
/**
* Takes a replacement array and processes the replacements
* Used for Str::replace()
*
* @param string $string String being replaced on (haystack)
* @param array $replacements Replacement array from Str::replacements()
* @return string String with replaced values
*/
public static function replaceReplacements(string $string, array $replacements): string
{
// replace in the order of the replacements
// behavior is identical to the official PHP str_replace()
foreach ($replacements as $replacement) {
if (is_int($replacement['limit']) === false) {
throw new Exception('Invalid limit "' . $replacement['limit'] . '".');
} elseif ($replacement['limit'] === -1) {
// no limit, we don't need our special replacement routine
$string = str_replace($replacement['search'], $replacement['replace'], $string);
} elseif ($replacement['limit'] > 0) {
// limit given, only replace for $replacement['limit'] times per replacement
$position = -1;
for ($i = 0; $i < $replacement['limit']; $i++) {
$position = strpos($string, $replacement['search'], $position + 1);
if (is_int($position) === true) {
$string = substr_replace($string, $replacement['replace'], $position, strlen($replacement['search']));
// adapt $pos to the now changed offset
$position = $position + strlen($replacement['replace']) - strlen($replacement['search']);
} else {
// no more match in the string
break;
}
}
}
}
return $string;
}
/**
* Safe rtrim alternative
*
* @param string $string
* @param string $trim
* @return string
*/
public static function rtrim(string $string, string $trim = ' '): string
{
return preg_replace('!(' . preg_quote($trim) . ')+$!', '', $string);
}
/**
* Shortens a string and adds an ellipsis if the string is too long
*
* <code>
*
* echo Str::short('This is a very, very, very long string', 10);
* // output: This is a…
*
* echo Str::short('This is a very, very, very long string', 10, '####');
* // output: This i####
*
* </code>
*
* @param string $string The string to be shortened
* @param int $length The final number of characters the
* string should have
* @param string $appendix The element, which should be added if the
* string is too long. Ellipsis is the default.
* @return string The shortened string
*/
public static function short(string $string = null, int $length = 0, string $appendix = ''): ?string
{
if ($length === 0) {
return $string;
}
if (static::length($string) <= $length) {
return $string;
}
return static::substr($string, 0, $length) . $appendix;
}
/**
* Convert a string to a safe version to be used in a URL
*
* @param string $string The unsafe string
* @param string $separator To be used instead of space and
* other non-word characters.
* @param string $allowed List of all allowed characters (regex)
* @param int $maxlength The maximum length of the slug
* @return string The safe string
*/
public static function slug(string $string = null, string $separator = null, string $allowed = null, int $maxlength = 128): string
{
$separator = $separator ?? static::$defaults['slug']['separator'];
$allowed = $allowed ?? static::$defaults['slug']['allowed'];
$string = trim($string);
$string = static::lower($string);
$string = static::ascii($string);
// replace spaces with simple dashes
$string = preg_replace('![^' . $allowed . ']!i', $separator, $string);
if (strlen($separator) > 0) {
// remove double separators
$string = preg_replace('![' . preg_quote($separator) . ']{2,}!', $separator, $string);
}
// replace slashes with dashes
$string = str_replace('/', $separator, $string);
// trim leading and trailing non-word-chars
$string = preg_replace('!^[^a-z0-9]+!', '', $string);
$string = preg_replace('![^a-z0-9]+$!', '', $string);
// cut the string after the given maxlength
return static::short($string, $maxlength, false);
}
/**
* Convert a string to snake case.
*
* @param string $value
* @param string $delimiter
* @return string
*/
public static function snake(string $value = null, string $delimiter = '_'): string
{
if (!ctype_lower($value)) {
$value = preg_replace('/\s+/u', '', ucwords($value));
$value = static::lower(preg_replace('/(.)(?=[A-Z])/u', '$1' . $delimiter, $value));
}
return $value;
}
/**
* Better alternative for explode()
* It takes care of removing empty values
* and it has a built-in way to skip values
* which are too short.
*
* @param string $string The string to split
* @param string $separator The string to split by
* @param int $length The min length of values.
* @return array An array of found values
*/
public static function split($string, string $separator = ',', int $length = 1): array
{
if (is_array($string) === true) {
return $string;
}
$parts = explode($separator, $string);
$out = [];
foreach ($parts as $p) {
$p = trim($p);
if (static::length($p) > 0 && static::length($p) >= $length) {
$out[] = $p;
}
}
return $out;
}
/**
* Checks if a string starts with the passed needle
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return bool
*/
public static function startsWith(string $string = null, string $needle, bool $caseInsensitive = false): bool
{
if ($needle === '') {
return true;
}
return static::position($string, $needle, $caseInsensitive) === 0;
}
/**
* A UTF-8 safe version of substr()
*
* @param string $string
* @param int $start
* @param int $length
* @return string
*/
public static function substr(string $string = null, int $start = 0, int $length = null): string
{
return mb_substr($string, $start, $length, 'UTF-8');
}
/**
* Replaces placeholders in string with value from array
*
* <code>
*
* echo Str::template('From {{ b }} to {{ a }}', ['a' => 'there', 'b' => 'here']);
* // output: From here to there
*
* </code>
*
* @param string $string The string with placeholders
* @param array $data Associative array with placeholders as
* keys and replacements as values
* @param string $fallback A fallback if a token does not have any matches
* @param string $start Placeholder start characters
* @param string $end Placeholder end characters
* @return string The filled-in string
*/
public static function template(string $string = null, array $data = [], string $fallback = null, string $start = '{{', string $end = '}}'): string
{
return preg_replace_callback('!' . $start . '(.*?)' . $end . '!', function ($match) use ($data, $fallback) {
$query = trim($match[1]);
if (strpos($query, '.') !== false) {
return (new Query($match[1], $data))->result() ?? $fallback;
}
return $data[$query] ?? $fallback;
}, $string);
}
/**
* Converts a filesize string with shortcuts
* like M, G or K to an integer value
*
* @param mixed $size
* @return int
*/
public static function toBytes($size): int
{
$size = trim($size);
$last = strtolower($size[strlen($size)-1] ?? null);
$size = (int)$size;
switch ($last) {
case 'g':
$size *= 1024;
// no break
case 'm':
$size *= 1024;
// no break
case 'k':
$size *= 1024;
}
return $size;
}
/**
* Convert the string to the given type
*
* @param string $string
* @param mixed $type
* @return mixed
*/
public static function toType($string = null, $type)
{
if (is_string($type) === false) {
$type = gettype($type);
}
switch ($type) {
case 'array':
return (array)$string;
case 'bool':
case 'boolean':
return filter_var($string, FILTER_VALIDATE_BOOLEAN);
case 'double':
case 'float':
return (float)$string;
case 'int':
case 'integer':
return (int)$string;
}
return (string)$string;
}
/**
* Safe trim alternative
*
* @param string $string
* @param string $trim
* @return string
*/
public static function trim(string $string, string $trim = ' '): string
{
return static::rtrim(static::ltrim($string, $trim), $trim);
}
/**
* A UTF-8 safe version of ucfirst()
*
* @param string $string
* @return string
*/
public static function ucfirst(string $string = null): string
{
return static::upper(static::substr($string, 0, 1)) . static::lower(static::substr($string, 1));
}
/**
* A UTF-8 safe version of ucwords()
*
* @param string $string
* @return string
*/
public static function ucwords(string $string = null): string
{
return mb_convert_case($string, MB_CASE_TITLE, 'UTF-8');
}
/**
* Removes all html tags and encoded chars from a string
*
* <code>
*
* echo str::unhtml('some <em>crazy</em> stuff');
* // output: some uber crazy stuff
*
* </code>
*
* @param string $string
* @return string The html string
*/
public static function unhtml(string $string = null): string
{
return Html::decode($string);
}
/**
* Returns the beginning of a string until the given character
*
* @param string $string
* @param string $needle
* @param bool $caseInsensitive
* @return string
*/
public static function until(string $string, string $needle, bool $caseInsensitive = false): string
{
$position = static::position($string, $needle, $caseInsensitive);
if ($position === false) {
return false;
} else {
return static::substr($string, 0, $position + static::length($needle));
}
}
/**
* A UTF-8 safe version of strotoupper()
*
* @param string $string
* @return string
*/
public static function upper(string $string = null): string
{
return mb_strtoupper($string, 'UTF-8');
}
/**
* The widont function makes sure that there are no
* typographical widows at the end of a paragraph –
* that's a single word in the last line
*
* @param string $string
* @return string
*/
public static function widont(string $string = null): string
{
return preg_replace_callback('|([^\s])\s+([^\s]+)\s*$|u', function ($matches) {
if (static::contains($matches[2], '-')) {
return $matches[1] . '&nbsp;' . str_replace('-', '&#8209;', $matches[2]);
} else {
return $matches[1] . '&nbsp;' . $matches[2];
}
}, $string);
}
}
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