Using Regex to find if the string is inside the array and replace it + PHP

Question

$restricted_images = array(
    "http://api.tweetmeme.com/imagebutton.gif",
    "http://stats.wordpress.com",
    "http://entrepreneur.com.feedsportal.com/",
    "http://feedads.g.doubleclick.net"
);

This are the list of images that I want to know if a certain string has that kind of string.

For example:

$string = "http://api.tweetmeme.com/imagebutton.gif/elson/test/1231adfa/".

Since "http://api.tweetmeme.com/imagebutton.gif" is in the $restricted_images array and it is also a string inside the variable $string, it will replace the $string variable into just a word "replace".

Do you have any idea how to do that one? I'm not a master of RegEx, so any help would be greatly appreciated and rewarded!

Thanks!

Taha Paksu · Accepted Answer · 2012-07-11 08:58:10Z

1

why regex?

$restricted_images = array(
    "http://api.tweetmeme.com/imagebutton.gif",
    "http://stats.wordpress.com",
    "http://entrepreneur.com.feedsportal.com/",
    "http://feedads.g.doubleclick.net"
);

$string = "http://api.tweetmeme.com/imagebutton.gif/elson/test/1231adfa/";
$restrict = false;
foreach($restricted_images as $restricted_image){
    if(strpos($string,$restricted_image)>-1){
        $restrict = true;
        break;
    }
}

if($restrict) $string = "replace";

answered Jul 11, 2012 at 8:58

Taha Paksu

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Comments

k102 · Accepted Answer · 2012-07-11 08:56:25Z

1

maybe this can help

foreach ($restricted_images as $key => $value) {
    if (strpos($string, $value) >= 0){
        $string = 'replace';
    }
}

answered Jul 11, 2012 at 8:56

k102

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Comments

Stegrex · Accepted Answer · 2012-07-11 08:57:02Z

0

You don't really need regex because you're looking for direct string matches.

You can try this:

foreach ($restricted_images as $url) // Iterate through each restricted URL.
{
    if (strpos($string, $url) !== false) // See if the restricted URL substring exists in the string you're trying to check.
    {
        $string = 'replace'; // Reset the value of variable $string.
    }
}

answered Jul 11, 2012 at 8:57

Stegrex

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Comments

Joram van den Boezem · Accepted Answer · 2012-07-11 08:59:41Z

0

You don't have to use regex'es for this.

$test = "http://api.tweetmeme.com/imagebutton.gif/elson/test/1231adfa/";
foreach($restricted_images as $restricted) {
    if (substr_count($test, $restricted)) {
        $test = 'FORBIDDEN';
    }
}

answered Jul 11, 2012 at 8:59

Joram van den Boezem

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Comments

Narf · Accepted Answer · 2012-07-11 09:05:53Z

0

// Prepare the $restricted_images array for use by preg_replace()
$func = function($value)
{
    return '/'.preg_quote($value).'/';
}
$restricted_images = array_map($func, $restricted_images);

$string = preg_replace($restricted_images, 'replace', $string);

Edit:

If you decide that you don't need to use regular expressions (which is not really needed with your example), here's a better example then all of those foreach() answers:

$string = str_replace($restricted_images, 'replace', $string);

edited Jul 11, 2012 at 9:05

answered Jul 11, 2012 at 9:00

Narf

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