本页文章导读:

    ▪php中html页面提取图片路径并替换的方法      代码如下：   代码示例: <?php /**  * php 提取html中图片并替换  * autho www. */ //要替换的内容 $content = '<img alt="" src="/blog_article/js/fckeditor/UserFiles/image/F201005201210502415831196.jpg" width="600" height="366">&.........

    ▪php分割GBK中文乱码的解决方法      类似如下的字符串(GBK), explode()不能得到正确结果: $result = explode("|", "滕华弢|海青"); 究其原因, 对于”弢”字(读tao,不认识没关系,我也不认识), 因为他的GBK编码值为: 8f7c, 不巧的是, “|”的ASCII.........

    ▪php实现json_encode的代码实例      我们知道，json_encode 是在5.2.0才作为标准扩展加入php的，我用的是php5.1.6，该扩展还未加进来。 不想再编译扩展了，于是自己用php实现json_encode，以下是实现代码，供大家学习参考。 代码如下.........

代码示例:

<?php
/**
 * php 提取html中图片并替换
 * autho www.
*/
//要替换的内容
$content = '<img alt="" src="/blog_article/js/fckeditor/UserFiles/image/F201005201210502415831196.jpg" width="600" height="366"><br><br><br><br><img alt="" src="/blog_article/js/fckeditor/UserFiles/image/33_avatar_middle.jpg" width="120" height="120">';  
     
//提取图片路径的src的正则表达式  
preg_match_all("/<img(.*)src="/blog_article/([^/index.html"]+)"[^>]+>/isU",$content,$matches);  
     
   $img = "";  
   if(!emptyempty($matches)) {  
   //注意，上面的正则表达式说明src的值是放在数组的第三个中  
 $img = $matches[2];  
   }else {  
 $img = "";  
   }  
if (!emptyempty($img)) {  
 $img_url = "http://".$_SERVER['SERVER_NAME'];  
     
 $patterns= array();  
 $replacements = array();  
     
 foreach($img as $imgItem){  
     
 $final_imgUrl = $img_url.$imgItem;  
 $replacements[] = $final_imgUrl;  
     
 $img_new = "/".preg_replace("/\//i","\/",$imgItem)."/";  
 $patterns[] = $img_new;  
}  
     
//让数组按照key来排序  
ksort($patterns);  
ksort($replacements);  
     
//替换内容  
$vote_content = preg_replace($patterns, $replacements, $content);
?>

代码示例:

<?php 
/**
 * php json_encode代码
 * site http://www.
*/
    function __json_encode( $data ) {            
        if( is_array($data) || is_object($data) ) { 
            $islist = is_array($data) && ( empty($data) || array_keys()($data) === range(0,count($data)-1) ); 
      
            if( $islist ) { 
                $json = '[' . implode(',', array_map('__json_encode', $data) ) . ']'; 
            } else { 
                $items = Array(); 
                foreach( $data as $key => $value ) { 
                    $items[] = __json_encode("$key") . ':' . __json_encode($value); 
                } 
                $json = '{' . implode(',', $items) . '}'; 
            } 
        } elseif( is_string($data) ) { 
            # Escape non-printable or Non-ASCII characters. 
            # I also put the \\ character first, as suggested in comments on the 'addclashes' page. 
            $string = '"' . addcslashes()($data, "\\\"\n\r\t/" . chr(8) . chr(12)) . '"'; 
            $json    = ''; 
            $len    = strlen($string); 
            # Convert UTF-8 to Hexadecimal Codepoints. 
            for( $i = 0; $i < $len; $i++ ) { 
      
                $char = $string[$i]; 
                $c1 = ord($char); 
      
                # Single byte; 
                if( $c1 <128 ) { 
                    $json .= ($c1 > 31) ? $char : sprintf()("\\u%04x", $c1); 
                    continue; 
                } 
      
                # Double byte 
                $c2 = ord($string[++$i]); 
                if ( ($c1 & 32) === 0 ) { 
                    $json .= sprintf("\\u%04x", ($c1 - 192) * 64 + $c2 - 128); 
                    continue; 
                } 
      
                # Triple 
                $c3 = ord($string[++$i]); 
                if( ($c1 & 16) === 0 ) { 
                    $json .= sprintf("\\u%04x", (($c1 - 224) <<12) + (($c2 - 128) << 6) + ($c3 - 128)); 
                    continue; 
                } 
      
                # Quadruple 
                $c4 = ord($string[++$i]); 
                if( ($c1 & 8 ) === 0 ) { 
                    $u = (($c1 & 15) << 2) + (($c2>>4) & 3) - 1; 
      
                    $w1 = (54<<10) + ($u<<6) + (($c2 & 15) << 2) + (($c3>>4) & 3); 
                    $w2 = (55<<10) + (($c3 & 15)<<6) + ($c4-128); 
                    $json .= sprintf("\\u%04x\\u%04x", $w1, $w2); 
                } 
            } 
        } else { 
            # int, floats, bools, null 
            $json = strtolower()(var_export( $data, true )); 
        } 
        return $json; 
    } 
?>