#124 missing compatibility layer

src/compat.php

@@ -0,0 +1,73 @@
+<?php
+
+
+if (!function_exists('mb_ord')) {
+
+	function mb_ord($s, $encoding = null)
+	{
+		if (null === $encoding) {
+			$s = mb_convert_encoding($s, 'UTF-8');
+		} elseif ('UTF-8' !== $encoding) {
+			$s = mb_convert_encoding($s, 'UTF-8', $encoding);
+		}
+
+		if (1 === \strlen($s)) {
+			return \ord($s);
+		}
+
+		$code = ($s = unpack('C*', substr($s, 0, 4))) ? $s[1] : 0;
+		if (0xF0 <= $code) {
+			return (($code - 0xF0) << 18) + (($s[2] - 0x80) << 12) + (($s[3] - 0x80) << 6) + $s[4] - 0x80;
+		}
+		if (0xE0 <= $code) {
+			return (($code - 0xE0) << 12) + (($s[2] - 0x80) << 6) + $s[3] - 0x80;
+		}
+		if (0xC0 <= $code) {
+			return (($code - 0xC0) << 6) + $s[2] - 0x80;
+		}
+
+		return $code;
+	}
+}
+
+if (!function_exists('stream_isatty')) {
+
+	// from symphony/polyfill
+	function stream_isatty($stream)
+	{
+		if (!\is_resource($stream)) {
+			trigger_error('stream_isatty() expects parameter 1 to be resource, ' . \gettype($stream) . ' given', E_USER_WARNING);
+
+			return false;
+		}
+
+		if ('\\' === \DIRECTORY_SEPARATOR) {
+			$stat = @fstat($stream);
+			// Check if formatted mode is S_IFCHR
+			return $stat ? 0020000 === ($stat['mode'] & 0170000) : false;
+		}
+
+		return function_exists('posix_isatty') && @posix_isatty($stream);
+	}
+}
+
+// source: Laravel Framework
+// https://github.com/laravel/framework/blob/8.x/src/Illuminate/Support/Str.php
+if (!function_exists('str_starts_with')) {
+	function str_starts_with($haystack, $needle)
+	{
+		return (string)$needle !== '' && strncmp($haystack, $needle, strlen($needle)) === 0;
+	}
+}
+if (!function_exists('str_ends_with')) {
+	function str_ends_with($haystack, $needle)
+	{
+		return $needle !== '' && substr($haystack, -strlen($needle)) === (string)$needle;
+	}
+}
+if (!function_exists('str_contains')) {
+	function str_contains($haystack, $needle)
+	{
+		return $needle !== '' && mb_strpos($haystack, $needle) !== false;
+	}
+}