php Regex help

marquis820

Hello,

Does anyone know the regex to trap any random characters.

I want to remove <img src="blah" /> or IMG, iMG or all variations fo this from a text block. When I detected, I want to store the whole thing in an array. One thing that makes this difficult for me to understand is a user can have any src name or have alt tags etc.

I want the start of <img (case insenstive), the data between and the />

-marquis

NogDog

$newString = preg_replace('/<img([\s\r\n][^>]*)>/i', '', $string);

(The "i" at the end of the regex makes it case-insensitive.)

marquis820

What does this translate to? ([\s\r\n][^>]*)

NogDog

marquis820 wrote:
What does this translate to? ([\s\r\n][^>]*)

Actually, upon looking at it again, I think I left out one character:

$newString = preg_replace('/<img([\s\r\n][^>]*)[color=red]?[/color]>/i', '', $string);

The idea is to match anything starting with <img and optionally followed by a whitespace (\s) or carriage return (\r) or newline (\n) character, which is then followed by zero to any number of characters which are not a ">", finally terminated by a ">" character. The "?" after the closing ")" will then mean zero or one occurrence of that sub-pattern enclosed by the parentheses. So along with the case-insensitive flag after the pattern, it should match any of these:

<IMG>
<img />
<IMg src="blah.jpg">
<iMg
src=blah.jpg alt="this is a test" />

marquis820

NogDog,

Thank you for the fix and explaination.! I suck at Regex. I need a good book on regex. I'm going to assume this is the same stuff as perl.

-Marquis

NogDog

marquis820 wrote:
NogDog,

Thank you for the fix and explaination.! I suck at Regex. I need a good book or regex. I'm going to assume this is the same stuff as perl.

-Marquis

The preg_*() functions are the "Perl-Compatible Regular Expression" (PCRE) functions, so anything you learn about Perl regexes should pretty much carry over the the PCRE functions in PHP (and vice versa).