Regular Expression...

Jeff · Feb 13, 2003, 04:18 AM

Anybody have a regex code for quotes in a string, which can allow backslash escaped quotes in the string, example:

current:

<blah src="asdads" />

gets matched correctly, but if you need quotes:

<blah src="asda"asd" /> it would only count "asda", and ignore the rest, anybody know how I can make it work with:

<blah src="asda\"asd" />

???

(I'll figure it out eventually, but thought I'd ask too, can't hurt)

Andrew275 · Feb 13, 2003, 04:46 AM

So you can't do:

/<blah src="(.*?)" \/>/

?

Jeff · Feb 13, 2003, 05:11 AM

That's what I am currently using, but I want to be able to escape characters in between the quotes.

Jeff · Feb 13, 2003, 05:12 AM

with that way, it counts this as the result: asda\ instead of asda"asd

UberLord · Feb 18, 2003, 07:00 PM

Code:

<?php
$string = '<tag value="ahhh\"hehe" value2="dumb\"ass\"bunny" />';

$slen = strlen($string);
$lastChar = "";
$values = array();
$quoteStart = false;
for ($index = 0; $index < $slen; $index ++) {
	$char = $string[$index];
	if (($char == '"') && ($lastChar != "\\")) {
		if ($quoteStart) {
			$values[] = $thisValue;
		} else {
			$thisValue = "";
		}
		$quoteStart = ! $quoteStart;
	} else {
		if ($quoteStart) $thisValue .= $char;
	}
	$lastChar = $char;
}
print_r($values);
?>

Obviously you could get the tag names by testing for " " & "=" as well.
I'm sure it could be done using regex, but I do things the old fashioned way.

I know many varied ways of string handling after writing a full english text parser for a MUD with the following string commands available

STRING3 = STRING1 + STRING2
LEFT$(STRING, 10)
RIGHT$(STRING, 10)
MID$(STRING, 10, 5)

Andrew275 · Feb 18, 2003, 10:09 PM

Quote:

Originally posted by UberLord
[code]

<?php
STRING3 = STRING1 + STRING2
LEFT$(STRING, 10)
RIGHT$(STRING, 10)
MID$(STRING, 10, 5)

BASIC

UberLord · Feb 18, 2003, 10:53 PM

Quote:

Originally posted by Andrew275
BASIC

It was either BASIC or 6502 assembly on the good old BBC Micro Model B
At age 5 I chose BASIC and happily wrote a text adventure game or 6 using full english parsers
At age 18 I was writing a "fake screen" program in 6502 that was sent back to the beeb in the system admins desk to hide what I was really doing

Jeff · Mar 25, 2003, 11:08 PM

PHP Code:


			
preg_match_all('/("|\\')([^\1\\\]*?(?:\\\.[^\1\\\]*?)*)\1/s', $str, $result);

Feb 13, 2003, 04:18 AM	#1
Jeff Yarr... I be blind! Join Date: May 2002 Location: Calgary, Canada Posts: 3,191 Rep Power: 80	Regular Expression... Anybody have a regex code for quotes in a string, which can allow backslash escaped quotes in the string, example: current: <blah src="asdads" /> gets matched correctly, but if you need quotes: <blah src="asda"asd" /> it would only count "asda", and ignore the rest, anybody know how I can make it work with: <blah src="asda\"asd" /> ??? (I'll figure it out eventually, but thought I'd ask too, can't hurt) __________________

Feb 13, 2003, 05:11 AM	Thread Starter #3
Jeff Yarr... I be blind! Join Date: May 2002 Location: Calgary, Canada Posts: 3,191 Rep Power: 80	That's what I am currently using, but I want to be able to escape characters in between the quotes. __________________

Feb 13, 2003, 05:12 AM	Thread Starter #4
Jeff Yarr... I be blind! Join Date: May 2002 Location: Calgary, Canada Posts: 3,191 Rep Power: 80	with that way, it counts this as the result: asda\ instead of asda"asd __________________

Feb 18, 2003, 07:00 PM	#5
UberLord A Legend in Underwear Join Date: May 2002 Location: Unknown Posts: 5,255 Rep Power: 0	Code: <?php $string = '<tag value="ahhh\"hehe" value2="dumb\"ass\"bunny" />'; $slen = strlen($string); $lastChar = ""; $values = array(); $quoteStart = false; for ($index = 0; $index < $slen; $index ++) { $char = $string[$index]; if (($char == '"') && ($lastChar != "\\")) { if ($quoteStart) { $values[] = $thisValue; } else { $thisValue = ""; } $quoteStart = ! $quoteStart; } else { if ($quoteStart) $thisValue .= $char; } $lastChar = $char; } print_r($values); ?> Obviously you could get the tag names by testing for " " & "=" as well. I'm sure it could be done using regex, but I do things the old fashioned way. I know many varied ways of string handling after writing a full english text parser for a MUD with the following string commands available STRING3 = STRING1 + STRING2 LEFT$(STRING, 10) RIGHT$(STRING, 10) MID$(STRING, 10, 5) __________________ Gentoo Linux - Developer (baselayout) Read my blog "I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours." Stephen Roberts

Mar 25, 2003, 11:08 PM	Thread Starter #8
Jeff Yarr... I be blind! Join Date: May 2002 Location: Calgary, Canada Posts: 3,191 Rep Power: 80	PHP Code: `preg_match_all('/("\|\\')([^\1\\\]?(?:\\\.[^\1\\\]?)*)\1/s', $str, $result);` __________________

Feb 13, 2003, 04:46 AM	#2
Andrew275 Custom User Title Join Date: May 2002 Location: Washington Posts: 1,125 Rep Power: 0 System Specs	So you can't do: /<blah src="(.*?)" \/>/ ?