63 lines
2.0 KiB
PHP
63 lines
2.0 KiB
PHP
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<?php
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/**
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* Polyfills for some functions, which are required by Haxe-generated code, but not available in PHP 7.0.
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* No Haxe-generated code is available at this point.
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* No code should be executed from this file.
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* Symbols declarations are the only code allowed here.
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*/
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namespace { //Namespace declaration is required because this file is included under non-root namespace.
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/**
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* @see http://php.net/manual/en/function.mb-chr.php
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*/
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if(!function_exists('mb_chr')) {
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function mb_chr($code, $encoding = null) {
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if($encoding && $encoding !== 'UTF-8') {
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throw new Exception("$encoding is not supported in mb_chr() polyfill.");
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}
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if (0x80 > $code %= 0x200000) {
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$s = chr($code);
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} elseif (0x800 > $code) {
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$s = chr(0xC0 | $code >> 6) . chr(0x80 | $code & 0x3F);
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} elseif (0x10000 > $code) {
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$s = chr(0xE0 | $code >> 12) . chr(0x80 | $code >> 6 & 0x3F) . chr(0x80 | $code & 0x3F);
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} else {
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$s = chr(0xF0 | $code >> 18) . chr(0x80 | $code >> 12 & 0x3F) . chr(0x80 | $code >> 6 & 0x3F) . chr(0x80 | $code & 0x3F);
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}
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return $s;
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}
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}
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/**
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* @see http://php.net/manual/en/function.mb-ord.php
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*/
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if(!function_exists('mb_ord')) {
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function mb_ord($s, $encoding = null) {
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if($encoding && $encoding !== 'UTF-8') {
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throw new Exception("$encoding is not supported in mb_ord() polyfill.");
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}
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$code = ($s = unpack('C*', substr($s, 0, 4))) ? $s[1] : 0;
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if (0xF0 <= $code) {
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return (($code - 0xF0) << 18) + (($s[2] - 0x80) << 12) + (($s[3] - 0x80) << 6) + $s[4] - 0x80;
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}
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if (0xE0 <= $code) {
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return (($code - 0xE0) << 12) + (($s[2] - 0x80) << 6) + $s[3] - 0x80;
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}
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if (0xC0 <= $code) {
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return (($code - 0xC0) << 6) + $s[2] - 0x80;
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}
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return $code;
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}
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}
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/**
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* @see http://php.net/manual/en/function.mb-scrub.php
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*/
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if(!function_exists('mb_scrub')) {
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function mb_scrub($s, $encoding = null) {
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$encoding = null === $encoding ? mb_internal_encoding() : $encoding;
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return mb_convert_encoding($s, $encoding, $encoding);
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}
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}
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}
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