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i want to change : to _ like

<img src="http://domainname.com/image:name.jpg">

output

<img src="http://domainname.com/image_name.jpg">

I have this regex but it doesn't work:

$f1content = preg_replace('/\<img src="\/\/(.*\.jpg"|.jpeg"|.gif" |.png"|.jpg">|.jpeg">|.gif">|.png">)/','/1',$content)

$result = str_replace(':', '_', $f1content);
dexter
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1 Answers1

3

If you just want to change from image:name.jpg to image_name.jpg you can use something like:

<?php
    $name = "image:name.jpg";

    $name = preg_replace('/\:/','_',$name);

    echo $name;

This will echo image_name.jpg

You can also use str_replace which should be faster then preg_replace, according to this entry. Which would be something like:

<?php
        $name = "image:name.jpg";

        $name = str_replace(':','_',$name);

        echo $name;

And this will also echo image_name.jpg

If you want to replace the whole URL maintaining the : in http://.... you can use \K.

According to Maroun Maroun:

\K tells the engine to pretend that the match attempt started at this position.

With the following code:

<?php
    $name = '<img src="http://domainname.com/image:name.jpg">';

    $name = preg_replace('/[^http:]\K(:)/', '_', $name);

    echo $name;

It will echo <img src="http://domainname.com/image_name.jpg">. You can see a working example here.

Community
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rafaelcpalmeida
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  • how to change name only, without others name,, if i use this, output = http_domain.com/image_name.jpg – dexter Feb 16 '17 at 02:41