104 lines
2.0 KiB
PHP
104 lines
2.0 KiB
PHP
<?php
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if (!function_exists('mb_strlen'))
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{
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// from Typo3
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// author Martin Kutschker <martin.t.kutschker@blackbox.net>
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function mb_strlen($str, $encoding="utf-8")
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{
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if($encoding != "utf-8")
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{ return -1; }
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$n=0;
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for($i=0; isset($str{$i}); $i++)
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{
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$c = ord($str{$i});
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if (!($c & 0x80)) // single-byte (0xxxxxx)
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$n++;
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elseif (($c & 0xC0) == 0xC0) // multi-byte starting byte (11xxxxxx)
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$n++;
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}
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return $n;
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}
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}
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if (!function_exists('mb_substr'))
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{
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// from Typo3
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// author Martin Kutschker <martin.t.kutschker@blackbox.net>
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function mb_substr($str, $start, $len=null, $encoding="utf-8")
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{
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if($encoding != "utf-8")
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{ return -1; }
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$byte_start = utf8_char2byte_pos($str,$start);
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if ($byte_start === false)
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return false; // $start outside string length
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$str = substr($str,$byte_start);
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if ($len != null)
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{
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$byte_end = utf8_char2byte_pos($str,$len);
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if ($byte_end === false) // $len outside actual string length
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return $str;
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else
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return substr($str,0,$byte_end);
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}
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else return $str;
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}
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function utf8_char2byte_pos($str,$pos)
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{
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$n = 0; // number of characters found
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$p = abs($pos); // number of characters wanted
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if ($pos >= 0)
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{
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$i = 0;
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$d = 1;
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} else {
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$i = strlen($str)-1;
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$d = -1;
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}
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for( ; isset($str{$i}) && $n<$p; $i+=$d)
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{
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$c = (int)ord($str{$i});
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if (!($c & 0x80)) // single-byte (0xxxxxx)
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$n++;
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elseif (($c & 0xC0) == 0xC0) // multi-byte starting byte (11xxxxxx)
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$n++;
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}
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if (!isset($str{$i}))
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return false; // offset beyond string length
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if ($pos >= 0)
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{
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// skip trailing multi-byte data bytes
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while ((ord($str{$i}) & 0x80) && !(ord($str{$i}) & 0x40))
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{ $i++; }
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} else {
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// correct offset
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$i++;
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}
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return $i;
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}
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if (!function_exists('mb_strtolower')) {
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function mb_strtolower($msg, $encoding) {
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return $msg;
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}
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}
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}
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