Insert new directory into a URL string just before the filename

Question

I have an image URL that is in the form of:

http://sub-domain.example.net/random-folder-here/4422414324235_4234234.jpg

and I would like to add a folder just before the image's filename (s720x720) to achieve this result:

http://sub-domain.example.net/random-folder-here/s720x720/4422414324235_4234234.jpg

How do I run a regex call in PHP that will help me do this?

You don't need regex, substr with strrpos would be easier.

Tom Smilack
– Tom Smilack

2012-12-29 20:54:05 +00:00
Commented Dec 29, 2012 at 20:54 — Tom Smilack
– Tom Smilack, Commented Dec 29, 2012 at 20:54

Andrew Kandels · Accepted Answer · 2012-12-29 20:52:07Z

1

preg_replace('![^/]+$!', 's720x720/$0', $str);

answered Dec 29, 2012 at 20:52

Andrew Kandels

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1 Comment

Petah Over a year ago

[^/] means anything but /, + means 1 or more, $ means end of line, and the ! are the delimiters.

hakre · Accepted Answer · 2012-12-29 22:06:23Z

You want to add s720x720 between the dirname and the basename (if taken the URL as a path). PHP has a function to out the URI apart here (see pathinfo):

$url = 'http://sub-domain.example.net/random-folder-here/4422414324235_4234234.jpg'; vprintf("%s/s720x720/%s", pathinfo($url));

Output:

http://sub-domain.example.net/random-folder-here/s720x720/4422414324235_4234234.jpg

I hope this helps. There is not always a need to use regular expressions. Other functions can be more fitting.

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