php preg_match_all函数参数在php文件中的一个函数

Question

I'm trying to find functionName('MATCH_1') ;, functionName( "MATCH2"); and ... functionName ('MATCH_X') ; and extract MATCH_XXX by the following text.

The text: Some text functionName('MATCH_1'); and other text functionName( "MATCH_2") ; and many another text.

Or many more in next line functionName( 'MATCH_X'); ... more text.

I want to get MATCH_1, MATCH2 and MATCH_X

My try:

<?php
preg_match_all('#functionName\s*\(\s*(\'|")(.*)(\'|")\s*\)\s*;#im', $content,$matches);

But my RegEx does not make what I want. Can you please explain me, as the RegEx must look like. And why he works like that.

regards raiserle

Answer 1

try this

$content = "The text: Some text functionName('MATCH_1'); and other text functionName( \"MATCH_2\") ; and many another text. Or many more in next line functionName( 'MATCH_X'); ... more text.";

preg_match_all('#functionName\s*\(\s*(\'|")(.*?)(\'|")\s*\)\s*;#im', $content,$matches);

var_dump($matches);

and then you should have what you want in $matches[2].

what i changed is i added the ? after the .* part of the regex, making it non-greedy (matching the shortest possible string instead of the longest match). This does make it less performant. See: here for an explanation of why and more detailed explanation.