PHP replace a dynamic string with blank

Question

I have this img tag

<img src="../img/tmp/pack_mini_5753_.jpg?time=1464793546" alt="" class="imgm img-thumbnail">

I would like to delete the string ?time=1464793546. I have the time a dynamic variable so 1464793546 will change dependent on time.

I tried this

 $image_tag = ImageManager::thumbnail($path_to_image, 'pack_mini_'.$pack_item->id.'_'.$this->context->shop->id.'.jpg', 120);
                        var_dump($image_tag);
 $pattern = '/(\w+)?time=(\d+)/i';
 $replacement = '${1}';
 $pack_items[$i]['image'] =preg_replace($pattern, $replacement, $image_tag);
 var_dump($pack_items[$i]['image']);exit;

$image_tag returns the img tag

<img src="../img/tmp/pack_mini_5753_.jpg?time=1464793546" alt="" class="imgm img-thumbnail">

Var_dump return null.

[`?` has a special meaning in regex](http://stackoverflow.com/questions/17400048/how-does-the-make-a-quantifier-lazy-in-regex/17400486#17400486). Escape it `\?` or nullify its meaning by putting it in a character class `[?]`. — HamZa, Jun 01 '16 at 15:11
You might want to use a character class, you won't need to escape and can include the `&` incase the parameter isn't first. `[?&]time=(\d+)` — chris85, Jun 01 '16 at 15:12
You saved my day tcpdf had problem reading images with time parameter (in Prestashop) — tarek fellah, Jun 01 '16 at 15:14

score 1 · Accepted Answer · edited Jun 01 '16 at 15:58

1

You forgot to escape the question mark which has special meaning in regex. Just escape it:

$pattern = '/\?time=(\d+)/i';

edited Jun 01 '16 at 15:58

chris85

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answered Jun 01 '16 at 15:48

splash58

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PHP replace a dynamic string with blank

1 Answers1