replace string in php if exist

Question

I have a string in php that looks like this

$(window).load(function(){
  $('.someclass').click(function () {
    $(this).text("clicked");
  });
});

what i want is - if string contains $(window).load(function(){ then replace this and also the end braces }); with empty string ""

But if $(window).load(function(){ do not exist then do nothing.

Here is what i have tried:

if(strpos($str,"$(window).load(function(){") == -1){
  // do nothing
}
else{
     str_replace("$(window).load(function(){","",$str);
     // how do i replace the last }); with ""
}

Why do want to do this (what's the context)? You can't simply remove .load directly on the page? — JoDev
– JoDev, Commented Mar 28, 2013 at 14:19
What if .load is written like this: $(window).load( function() { (note extra spaces). Arguably this can be resolved by using regex but IMO it will be an error prone operation. — anubhava
– anubhava, Commented Mar 28, 2013 at 14:24
i will always get that string without that extra space.. so you can be sure that their will be no extra space — JAVAGeek
– JAVAGeek, Commented Mar 28, 2013 at 14:36

Ja͢ck · Accepted Answer · 2013-03-28 14:25:57Z

1

If your code is nicely indented like that, this might just work for you:

$str = <<<EOM
$(window).load(function(){
  $('.someclass').click(function () {
    $(this).text("clicked");
  });
});
EOM;

$start = preg_quote('$(window).load(function(){');
$end = preg_quote('});');

$new = preg_replace("/^$start\s*(.*?)^$end/ms", '$1', $str);

print_r($new);

answered Mar 28, 2013 at 14:25

Ja͢ck

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3 Comments

JAVAGeek Over a year ago

i am getting string like this $str = file_get_contents('file.js'); .... can you please update your answer accordingly..

JAVAGeek Over a year ago

can i do this $str = <<<EOM file_get_contents('file.js'); EOM;

Ja͢ck Over a year ago

@JAVAGeek Then just replace that block with $str = file_get_contents('file.js');.

Sébastien Renauld · Accepted Answer · 2013-03-28 14:38:38Z

1

You will need regular expressions for this one if you can guarantee that the }); will be the last one. If so:

$str = preg_replace("#\$\(window\)\.load\(function\(\) \{(.*)\}\);#is","",trim($str));

Should do the trick.

If you cannot guarantee that the }); you want to replace will be the last occurence, you will have to walk through your code and count the braces. No other way, sadly :-(

edited Mar 28, 2013 at 14:38

answered Mar 28, 2013 at 14:20

Sébastien Renauld

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7 Comments

kainaw Over a year ago

You can replace that last $str with trim($str) just to ensure there's no extra returns or spaces.

JAVAGeek Over a year ago

if their is $(window).load(function(){ present then their will be end braces too always

JAVAGeek Over a year ago

what i did

$str = file_get_contents('file.js');  $str = preg_replace("#\$\(window\)\.load\(function\(\) \{(.*)\}\);#i","",trim($str));  echo $str;

kainaw Over a year ago

That confirms the issue I didn't state about this answer. Using preg_replace will check only the first line of text. It will not treat it as a glob. It stops at the \n. I believe the /s modifier will allow it to use the whole string as a string and not only the first line.

JAVAGeek Over a year ago

where do you put that /s

|

Matt Cain · Accepted Answer · 2013-03-28 14:21:56Z

0

$str = substr($str, 0, strlen($str) - 4);

This will remove the last 3 characters of the string.

answered Mar 28, 2013 at 14:21

Matt Cain

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Comments

Uberfuzzy · Accepted Answer · 2013-03-28 14:22:41Z

0

Find the position of the last occurrence with strrpos ? Then maybe do a str_replace from that point with a limit of 1? You should check the modified string with an external call to something like JSlint to make sure you didnt create malformed code.

answered Mar 28, 2013 at 14:22

Uberfuzzy

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Comments

JoDev · Accepted Answer · 2013-03-28 14:40:09Z

0

I think, a working way will be just to test for (window).load, and to add this :

str_replace('$(window).load', "var functionOnLoad = ", $str);

Don't forget to add a call to this function if you want it to be execute. Somethink like :

str_replace('</script>', "functionOnLoad();</script>", $str);

edited Mar 28, 2013 at 14:40

answered Mar 28, 2013 at 14:34

JoDev

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