php自定义函数实现JS的escape的方法示例

2021-02-01 16:56HTL PHP教程

这篇文章主要介绍了php自定义函数实现JS的escape的方法,结合完整实例形式分析了php实现JS的escape功能函数的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了php自定义函数实现JS的escape的方法。分享给大家供大家参考，具体如下：

									//php function

									function escape($string) {

									    $n = $bn = $tn = 0;

									    $output = '';

									    $special = "-_.+@/*0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

									    while($n < strlen($string)) {

									        $ascii = ord($string[$n]);

									        if($ascii == 9 || $ascii == 10 || (32 <= $ascii && $ascii <= 126)) {

									            $tn = 1;$n++;

									        } elseif(194 <= $ascii && $ascii <= 223) {

									            $tn = 2;$n += 2;

									        } elseif(224 <= $ascii && $ascii <= 239) {

									            $tn = 3;$n += 3;

									        } elseif(240 <= $ascii && $ascii <= 247) {

									            $tn = 4;$n += 4;

									        } elseif(248 <= $ascii && $ascii <= 251) {

									            $tn = 5;$n += 5;

									        } elseif($ascii == 252 || $ascii == 253) {

									            $tn = 6;$n += 6;

									        } else {

									            $n++;

									        }

									        $singleStr = substr($string,$bn,$tn);

									        $charVal = bin2hex(iconv('utf-8', 'ucs-2', $singleStr));

									        if(base_convert($charVal, 16, 10) > 0xff) {

									           if (!preg_match("/win/i", PHP_OS))

									            $charVal = substr($charVal, 2, 2).substr($charVal, 0, 2);

									          $output .= '%u' . $charVal;

									        }

									        else {

									            if(false !== strpos($special, $singleStr))

									               $output .= $singleStr;

									            else

									               $output .="%" . dechex(ord($string[$bn]));

									        }

									     $bn = $n;

									    }

									    return $output;

									}