preg_match to retrieve string

Question

I need to retrieve the data-videoid ( h7rhqXbdIts )

<?php
$pattern = '\'/data-videoid="([^"]+)/\'';
$subject = '<amp-youtube width="640" height="360" data-videoid="h7rhqXbdIts" layout="responsive"></amp-youtube>';
$result = preg_match( $pattern, $subject , $matches );
echo $result;
print_r($matches);
?>

Blue · Accepted Answer · 2017-07-18 04:35:00Z

1

You added some ' single quotes at the start/end of your pattern, which is attempting to do a literal match for the quotes (Which don't exist). Simply removing them should solve your issue:

<?php
$pattern = '/data-videoid="([^"]+)/';
$subject = '<amp-youtube width="640" height="360" data-videoid="h7rhqXbdIts" layout="responsive"></amp-youtube>';
$result = preg_match( $pattern, $subject , $matches );
echo $result;
print_r($matches);
?>

See this output where you can see that $matches[1] contains the videoid you're looking for (h7rhqXbdIts).

answered Jul 18, 2017 at 4:35

Blue

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Comments

Viet Nguyen · Accepted Answer · 2017-07-18 04:33:49Z

0

This code should work

$subject = '<amp-youtube width="640" height="360" data-videoid="h7rhqXbdIts" layout="responsive"></amp-youtube>';
$result = preg_match( '@data-videoid="(.*?)"@s', $subject , $matches );
echo $result;
print_r($matches); //Array ( [0] => data-videoid="h7rhqXbdIts" [1] => h7rhqXbdIts )

answered Jul 18, 2017 at 4:33

Viet Nguyen

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4 Comments

Blue Over a year ago

Your first code sample you pushed, had a blank pattern and did not work. Your code snippet now, doesn't show why his code isn't working. Code blocks without explanations do little to help future readers understand why the code wasn't working correctly.

Viet Nguyen Over a year ago

I accepted without explanations part but even $pattern = '' still work because I write directly inside preg_match.

Blue Over a year ago

The code was broken at that point (I didn't recall exactly why, because the history of this post isn't showing edits because you deleted/undeleted the answer), but when I copied/pasted it into a php fiddle, it didn't work.

Viet Nguyen Over a year ago

I still keep the first version because I write in phptestter.net and not close yet and I sure that works fine. Next time I hope your hands do not faster than your brain.

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