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lib.php
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lib.php
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<?php
class Lib
{
const CHARSET = 'UTF-8';
/**
* @param string $string
* @return string
*/
public static function sanitizeFilename($string)
{
return trim(
preg_replace(
'/\\W+/',
'-',
mb_strtolower(trim($string), self::CHARSET)
),
'-'
);
}
/**
* @param mixed $arr
* @param string $index
* @param $default
* @return false|mixed|null
*/
public static function arrayExtract(&$arr, $index, $default = null)
{
if (is_array($arr)) {
if (array_key_exists($index, $arr)) {
$res = $arr[$index];
unset($arr[$index]);
return $res;
} else {
return $default;
}
} else {
return false;
}
}
/**
* return human-readable amount rounded to 3 meaningful numbers with appropriate ISO suffix
* (K=kilo, M=mega, G=giga, T=tera, P=peta)
* @param int $amount amount to convert
* @return string value like '150', '8.37K', '15M', '374G'
* @assert(20) == '20'
* @assert(999) == '999'
* @assert(1000) == '0.98K'
* @assert(1024) == '1K'
* @assert(2000) == '1.95K'
* @assert(2048) == '2K'
* @assert(2100) == '2.05K'
* @assert(2150) == '2.1K'
* @assert(2157) == '2.11K'
* @assert(21573) == '21.1K'
* @assert(-21573) == '-21.1K'
*/
public static function shortFloat($amount)
{
if (!isset($amount)) {
return null;
}
$amount_abs = abs($amount);
if ($amount_abs >= 1000000000000000) {
return ($amount_abs >= 100000000000000000
? round($amount / 1125899906842624)
: ($amount_abs >= 10000000000000000
? round($amount / 1125899906842624, 1)
: round($amount / 1125899906842624, 2)
)
) . 'P';
} elseif ($amount_abs >= 1000000000000) {
return ($amount_abs >= 100000000000000
? round($amount / 1099511627776)
: ($amount_abs >= 10000000000000
? round($amount / 1099511627776, 1)
: round($amount / 1099511627776, 2)
)
) . 'T';
} elseif ($amount_abs >= 1000000000) {
return ($amount_abs >= 100000000000
? round($amount / 1073741824)
: ($amount_abs >= 10000000000
? round($amount / 1073741824, 1)
: round($amount / 1073741824, 2)
)
) . 'G';
} elseif ($amount_abs >= 1000000) {
return ($amount_abs >= 100000000
? round($amount / 1048576)
: ($amount_abs >= 10000000
? round($amount / 1048576, 1)
: round($amount / 1048576, 2)
)
) . 'M';
} elseif ($amount_abs >= 1000) {
return ($amount_abs >= 100000
? round($amount / 1024)
: ($amount_abs >= 10000
? round($amount / 1024, 1)
: round($amount / 1024, 2)
)
) . 'K';
} elseif ($amount_abs >= 1) {
return $amount_abs >= 100
? round($amount)
: ($amount_abs >= 10
? round($amount, 1)
: round($amount, 2)
);
} elseif ($amount_abs >= 0.001) {
return strlen(round($amount_abs, 3)) < 5
? round($amount, 3)
: str_replace('0.', '.', round($amount, 3));
} elseif ($amount_abs > 0) {
return $amount > 0
? '+0'
: '-0';
} else {
return 0;
}
}
/**
* return human-readable amount rounded to 3 meaningful numbers with appropriate ISO suffix
* (K=kilo, M=mega, G=giga, T=tera, P=peta)
* @param int $amount amount to convert
* @return string value like '150', '8.37K', '15M', '374G'
* @assert(20) == '20'
* @assert(999) == '999'
* @assert(1000) == '1K'
* @assert(2000) == '2K'
* @assert(2100) == '2.1K'
* @assert(2150) == '2.15K'
* @assert(2157) == '2.16K'
* @assert(21573) == '21.6K'
* @assert(-21573) == '-21.6K'
* @assert(2000, 'K') == '2'
* @assert(2157, 'K') == '2.16'
*/
public static function humanFloat($amount)
{
if (!isset($amount)) {
return null;
}
$amount_abs = abs($amount);
if ($amount_abs >= 1000000000000000) {
return ($amount_abs >= 100000000000000000
? round($amount / 1000000000000000)
: ($amount_abs >= 10000000000000000
? round($amount / 1000000000000000, 1)
: round($amount / 1000000000000000, 2)
)
) . 'P';
} elseif ($amount_abs >= 1000000000000) {
return ($amount_abs >= 100000000000000
? round($amount / 1000000000000)
: ($amount_abs >= 10000000000000
? round($amount / 1000000000000, 1)
: round($amount / 1000000000000, 2)
)
) . 'T';
} elseif ($amount_abs >= 1000000000) {
return ($amount_abs >= 100000000000
? round($amount / 1000000000)
: ($amount_abs >= 10000000000
? round($amount / 1000000000, 1)
: round($amount / 1000000000, 2)
)
) . 'G';
} elseif ($amount_abs >= 1000000) {
return ($amount_abs >= 100000000
? round($amount / 1000000)
: ($amount_abs >= 10000000
? round($amount / 1000000, 1)
: round($amount / 1000000, 2)
)
) . 'M';
} elseif ($amount_abs >= 1000) {
return ($amount_abs >= 100000
? round($amount / 1000)
: ($amount_abs >= 10000
? round($amount / 1000, 1)
: round($amount / 1000, 2)
)
) . 'K';
} elseif ($amount_abs >= 1) {
return $amount_abs >= 100
? round($amount)
: ($amount_abs >= 10
? round($amount, 1)
: round($amount, 2)
);
} elseif ($amount_abs >= 0.001) {
return strlen(round($amount_abs, 3)) < 5
? round($amount, 3)
: str_replace('0.', '.', round($amount, 3));
} elseif ($amount_abs > 0) {
return $amount > 0
? '+0'
: '-0';
} else {
return 0;
}
}
}