Filter URL with regex in PHP
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Is someone willing to help me filtering a URL using regex? I've come pretty far, but I stumble upon one last issue.
Scenario:
- The user submits the link of their SoundCloud song in a Gravity Forms website field.
- The script automatically ads https:// automatically if the user does not add it.
- Removes www. and m. from the URL.
- Sometimes a link with a private URL extension is submitted: https://soundcloud.com/username/songtitle/s-qciX1vDI2Cq
What can I do so the script also removes s-qciX1vDI2Cq from the URL too?
Example input http://www.soundcloud.com/username/songtitle/s-qciX1vDI2Cq
Example output https://soundcloud.com/username/songtitle
Many thanks in advance!
add_filter( 'gform_pre_render', 'itsg_check_website_field_value' );
add_filter( 'gform_pre_validation', 'itsg_check_website_field_value' );
function itsg_check_website_field_value( $form ) {
foreach ( $form['fields'] as &$field ) { // for all form fields
if ( 'website' == $field['type'] || ( isset( $field['inputType'] ) && 'website' == $field['inputType']) ) { // select the fields that are 'website' type
$value = RGFormsModel::get_field_value($field); // get the value of the field
if (! empty($value) ) { // if value not empty
$field_id = $field['id']; // get the field id
if (! preg_match("~^(?:f|ht)tps?://~i", $value) ) { // if value does not start with ftp:// http:// or https://
$value = "https://" . $value; // add https:// to start of value
}
if ( preg_match("/(https?:\/\/)(www\.|m\.)?soundcloud\.com\/([^\s\n]+)\/([^\s\n]+)\/([^\s\n]+)", $value)) {
$temp = explode("/", $value);
array_pop($temp);
$value = implode("/", $temp);
}
preg_match("/(https?:\/\/)(www\.|m\.)?([^\s\n]+)(\/+)?/", $value, $extractedDomain);
$value = "https://" . $extractedDomain[3];
preg_match('/^(.*?)(\?.*)?$/', $value, $noSearch);
$value = trim($noSearch[1], '/') . '';
$_POST['input_' . $field_id] = $value; // update post with new value
}
}
}
return $form;
}
Answer
Solution:
Use regex pattern
^(?:https?:\/\/|)(?:www|m)\.(soundcloud\.com\/[^\/]+\/[^\/]+)(?:\/.*?|)$
and do a replacement with
http://$1
Test it and see explanation (on right top corner) at https://regex101.com/r/mwa4JP/1
See PHP demo at https://www.ideone.com/rdKb3P
preg_replace("/^(?:https?:\/\/|)(?:www|m)\.(soundcloud\.com\/[^\/]+\/[^\/]+)(?:\/.*?|)$/",
"http://$1", $input);
To accept uppercase letters in optionalwww. andm. prefixes and/or in thesoundcloud.com domain name, addi regex modifier:
/^(?:https?:\/\/|)(?:www|m)\.(soundcloud\.com\/[^\/]+\/[^\/]+)(?:\/.*?|)$/i
Answer
Solution:
I would go for the regex '///'
$url = 'http://www.soundcloud.com/username/songtitle/s-qciX1vDI2Cq';
$regex = '/\//';
$a = preg_split($regex, $url);
print_r($a);
output:
Array
(
[0] => http:
[1] =>
[2] => www.soundcloud.com
[3] => username
[4] => songtitle
[5] => s-qciX1vDI2Cq
)
Now you can join these elements from 0 to 4 to give the correct url.
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Additional Information:
Link To Answer People are also looking for solutions of the problem: the requested url was not found on this server. xampp
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