PHP preg_match problem

Question

content.tpl

tratata 'hey' tratata <br/>
okay 'aaaaa' <br/>
'trtata' <br/>
echo 'tratata'hmmmm'traatata';
'hello' tratata <br/>

How do I change all the quotes ONLY in the echo?

I need

tratata 'hey' tratata <br/>
okay 'aaaaa' <br/>
'trtata' <br/>
echo 'tratata\'hmmmm\'traatata';
'hello' tratata <br/>

Thank you

I haven't got the slightest clue what you are asking. Could you give a real world example? — lonesomeday
– lonesomeday, Commented Nov 14, 2010 at 15:02
@Vincent Glad to hear it! I get the basic point, but I don't understand the example, which is pretty much gobbledegook -- what's the purpose of this escaping? — lonesomeday
– lonesomeday, Commented Nov 14, 2010 at 15:07
@lonesomeday: So that the echo works correctly. He probably generated this code and want to fix it. — Vincent Savard
– Vincent Savard, Commented Nov 14, 2010 at 15:09
@Vincent The echo will work correctly, but this still won't be valid PHP. — lonesomeday
– lonesomeday, Commented Nov 14, 2010 at 15:11

Vincent Savard · Accepted Answer · 2010-11-14 15:05:00Z

3

It's pretty easy with a callback :

$var = preg_replace_callback("`(?<=echo ')(.+)(?=';)`iU", function ($matches) { return addslashes($matches[1]); }, $var)

First, we match the echo quoted string (and nothing else), then we apply the addslashes function on what we found. The ungreedy (U) option is important so the .+ doesn't match the whole string.

answered Nov 14, 2010 at 15:05

Vincent Savard

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