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php的preg_replace使用

WBOY
Release: 2016-06-20 12:26:28
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现有xml文件内容如下:

...<group>			<title></title>			<value>35</value>			<label>$35.00K</label>			<link>index.php?module=Opportunities&action=index&query=true&searchFormTab=advanced_search&lead_source=</link>			<subgroups>				<group>					<title>Prospecting</title>					<value>0</value>					<label>$0.00K</label>					<link>index.php?module=Opportunities&action=index&query=true&searchFormTab=advanced_search&lead_source=&sales_stage=Prospecting</link>				</group>				<group>					<title>Qualification</title>					<value>0</value>					<label>$0.00K</label>					<link>index.php?module=Opportunities&action=index&query=true&searchFormTab=advanced_search&lead_source=&sales_stage=Qualification</link>				</group>....
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有如下一段方法,处理xml的,替换节点link的内容,将里面的链接内容用urlencode编码:
function processXML($xmlFile) {		if(!file_exists($xmlFile)) {			$GLOBALS['log']->debug("Cannot open file ($xmlFile)");		}		$pattern = array();		$replacement = array();		$content = file_get_contents($xmlFile);		$content = $GLOBALS['locale']->translateCharset($content,'UTF-16LE', 'UTF-8');               //这行有问题		$pattern[] = '/\<link\>([a-zA-Z0-9#?&%.;\[\]\/=+_-\s]+)\<\/link\>/e';		$replacement[] = "'<link>'.urlencode(\"$1\").'</link>'";		return preg_replace($pattern,$replacement, $content);	}
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上面代码的正则表达式在php5.4中是可以的,但是5.5以上版本取消了e参数。我尝试用preg_replace_callback改写,但失败了,preg_replace_callback的代码如下:
$content = preg_replace_callback(			'|<link>([a-zA-Z0-9#?&%.;\[\]\/=+_-\s]+)<\/link>|',			function ($matches) {				$u = urlencode($matches[1]);				return "<link>".$u."</link>";			},			$content		);
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运行是有如下错误:Warning: preg_replace_callback(): Compilation failed: invalid range in character class at offset 34

该怎么修改呢,系统环境是php5.6.21


回复讨论(解决方案)

$content = preg_replace_callback(            '/\<link\>(.+?)\<\/link\>/',            function ($matches) {                return "<link>".urlencode($matches[1])."</link>";            },            $content        );
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$content = preg_replace_callback(            '/\<link\>(.+?)\<\/link\>/',            function ($matches) {                return "<link>".urlencode($matches[1])."</link>";            },            $content        );
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试了下,没匹配到...同样的正则,我在那种在线正则测试网页上试了是可以的,但是php的这个方法就不行

测试了你的代码,并没有发现不对的地方
可能是你贴错了吧

测试了你的代码,并没有发现不对的地方
可能是你贴错了吧


你那php多少版本,内容都对的,一直没成功

php5.4.31 和 php5.6.13 ,测试了,都没有问题
我测试的你贴出的代码,不排除你在粘贴前有非法字符被 CSDN 吃掉了

不过你的 
'|([a-zA-Z0-9#?&%.;\[\]\/=+_ -\s]+)|'
确实写的不对!
- 在方括号中表示区间,如果是 - 这个字符,应该将其写在最

Compilation failed: invalid range in character class 编译失败:字符类中无效的范围
\s 可表示  空格、制表符、回车、换行
那么 _-\s 应表示一个什么样的字符区间呢?

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