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关于preg_replace()函数反向引用用法的有关问题

WBOY
WBOYOriginal
2016-06-13 12:26:301308browse

关于preg_replace()函数反向引用用法的问题。

<br />$Array1=array(<br />	array('ID'=>'1','Name'=>'小王'),<br />	array('ID'=>'2','Name'=>'小李')<br />	);<br /><br />$strA='AA Name CC DD';<br />$strB='/\s+(\w+)\s+/i';<br />$Html=preg_replace($strB, $Array1[0][‘${2}’], $strA);<br />echo $Html;<br />


如上面所示返向引用${2}如下这么写是没问题的:
$Html=preg_replace($strB, ‘${2}’, $strA);


但是,如果我想把这个引用过来的字符串当作数组的键名,如$array['${1}']!。就会报错。如何解决这个问题呢?
Notice: Undefined index: in F:\Web\wwwroot\CMS\TemplateClass.php on line 236
------解决思路----------------------
对于 php5.5 一下,可以
$Array1 = array(<br />    array('ID'=>'1','Name'=>'小王'),<br />    array('ID'=>'2','Name'=>'小李')<br />    );<br /> <br />$strA = 'AA Name CC DD';<br />$strB = '/\s+(\w+)\s+/ie';<br />$Html = preg_replace($strB, '$Array1[0]["$1"]', $strA);<br />echo $Html;<br />

对于 php5.3及以上,可以
$Array1 = array(<br />    array('ID'=>'1','Name'=>'小王'),<br />    array('ID'=>'2','Name'=>'小李')<br />    );<br /> <br />$strA = 'AA Name CC DD';<br />$strB = '/\s+(\w+)\s+/i';<br />$Html = preg_replace_callback($strB, function($m) use ($Array1) { return $Array1[0][$m[1]];}, $strA);<br />echo $Html;

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