Regular Expression Help (Yes, I've searched...) 1

[kenrbnsn]

I want to parse an IMG tag from HTML that will always be in the same format (it's being generated by another program). The tag will always look like:

<img src="image.PNG" alt="some descriptive text">

I want to parse this so I can get the src file name and the alt text.

I've been looking at examples and trying them until I have a headache...

Can anyone help me out.

Thanks in advance.

Ken

 

[sleipnir214]

This little script:

<?php

$a = '<img src="image.PNG" alt="some descriptive text">';

list ($src_value, $alt_value) = explode ("\t", preg_replace ('/.*src="([^"]*)" alt="([^"]*)".*/', "$1\t$2", $a));

?>

Sets $src_value and $alt_value to the correct values.


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[kenrbnsn]

Thanks for the script. It works as advertised.

Can you explain the search strings a little.

Ken

 

[sleipnir214]

It basically:
eats everything up to 'src="'
then matches everything that's not a doublequote
then eats '" alt="'
then matches everything that's not a doublequote
then eats everything else.

It replaces what it's eaten and matched (which is the entire string) with:
the first-matched substring
a tab character
the second-matched substring

All this is passed to explode(), which breaks the string into an array on the tab character.


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TANSTAAFL!!

 

[kenrbnsn]

Thanks again.

In my experimenting, I was missing the 'eats everything up to 'src="'' piece...

I've taken your script and put to work in a script I've been writing (on and off) for about 2 weeks...

Ken