Regex function to change url to another

Question

Im totally new to regex. I need your help.

What is the regex function for changing the below url to url listed downside? How to use that regex function in PHP.

https://fbcdn-photos-a.akamaihd.net/hphotos-ak-ash4/393656_257350694313804_126044397444435_712409_344887174_s.jpg

TO

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/s320x320/393656_257350694313804_126044397444435_712409_344887174_n.jpg

OR

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/s480x480/393656_257350694313804_126044397444435_712409_344887174_n.jpg

Thanks in advance.

i think u can use a couple of str_replace here instead of regexp — Ziumin
– Ziumin, Commented Jul 1, 2012 at 7:36
Is the original url layout always going to be [domain]/[folder]/[image]? — Patch
– Patch, Commented Jul 1, 2012 at 7:46

Patch · Accepted Answer · 2012-07-01 08:01:31Z

1

$size = "s320x320";
$url = preg_replace("#https://(.*)/(.*)/(.*)\_s.jpg#i", "https://$1/$2/$size/$3_n.jpg", $url);
$url = str_replace("-photos-", "-sphotos-", $url);

This code is untested, but should work. The third line, str_replace, is used to make the regex simpler. :)

answered Jul 1, 2012 at 8:01

Patch

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MaxSem · Accepted Answer · 2012-07-01 07:50:26Z

0

preg_replace( '#^(.*?)photos(.*)(/[^/]*?)_s.jpg$#', '$1sphotos$2/s320x320$3_n.jpg', $url );

edited Jul 1, 2012 at 7:50

answered Jul 1, 2012 at 7:37

MaxSem

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2 Comments

Ziumin Over a year ago

domain and filename are also differ

Rajan Over a year ago

Thanks. Also fbcdn-photos-a.akamaihd.net should converted to fbcdn-sphotos-a.akamaihd.net and _s.jpg should changed to _n.jpg.

Ziumin · Accepted Answer · 2012-07-01 07:51:00Z

0

Ok, let me try to answer with some code

$url = 'https://fbcdn-photos-a.akamaihd.net/hphotos-ak-ash4/393656_257350694313804_126044397444435_712409_344887174_s.jpg';
$str = array('fbcdn-photos-a.akamaihd.net/hphotos-ak-ash4', '_s');
$rep1 = array('fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/s320x320', '_n');
$rep2 = array('fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/s480x480', '_n');

//TO
$url1 = str_replace($str, $rep1, $url);
//OR
$url2 = str_replace($str, $rep2, $url);

answered Jul 1, 2012 at 7:51

Ziumin

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1 Comment

Rajan Over a year ago

Thanks. is it possible change hardcoded string (fbcdn-photos-a.akamaihd.net/hphotos-ak-ash4) to dynamic?

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