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Regular Expression Code Gallery

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Nov 09.2004

Does anyone know of a reliable site that would have pre-made regexps that could be used for a variety of applications. Personally, I’m interested in finding regexps for a basic contact information form: Name, Address, City, etc…

Thanks ?

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PHP

8 Comments(s) ↴

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@JonaNov 09.2004 — [font=trebuchet ms]Although not a common practice, I'm willing to be your human reference at this point; what exactly are you looking to validate? That the characters given are indeed letters and exclusively letters?[/font]

[code=php]
 $string = "abc";
if(preg_match("/[a-zA-Z]/", $string)){
echo "Correct.";
} else {
echo "Incorrect.";
}
[/code]
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@kouki0196authorNov 09.2004 — Hi, Jona.

Here are some examples of things that wouldn't fly with a simple letter-only expression:

address: 100 Massachuesetts Ave, NW.

address: Suite 800

name: Joe D'Angelo

name: Mary Smith-Cunning

I guess what I am looking for is an expression that will accept these types of answers, but strip the punctuation marks.

Thanks
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@JonaNov 09.2004 — [font=trebuchet ms]Something like the following?[/font]

<i>
</i>/[a-zA-Z0-9,\'";@:]/
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@AdamBrillNov 09.2004 — First off, why do /[a-zA-Z]/ instead of /a-z]/i? Not that it really matters, but...

Second, your regex(/a-zA-Z/) will only check if one of the characters in the string is an alpha character, it won't make sure that each character is. So the updated code would look like this:

[code=php]
$string = "abc";
if(preg_match("/^[a-z]*$/i", $string)){
echo "Correct.";
} else {
echo "Incorrect.";
}
[/code]Or, for your second regex code example:
[code=php]
if(preg_match("/^[a-z0-9,'";@:]*$/i", $string)){
echo "Correct.";
} else {
echo "Incorrect.";
}
[/code]
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@JonaNov 09.2004 — [font=trebuchet ms]D'oh! Thanks, Adam.[/font]
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@AdamBrillNov 09.2004 — [i]Originally posted by Jona [/i]

[B][font=trebuchet ms]D'oh! Thanks, Adam.[/font] [/B][/QUOTE] No problem. You better go get some sleep. ?
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@JonaNov 09.2004 — [i]Originally posted by AdamBrill [/i]

[B]No problem. You better go get some sleep. ? [/B][/QUOTE]

[font=trebuchet ms]I'm on it. ? [/font]
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@NogDogNov 09.2004 — [code=php]
$string = "John O'Donnell,123 Main St., Anywhere-Ville, NJ.";
# replace comma followed by 0 or more spaces with 1 space:
$search[0] = "/, */";
$replace[0] = "/ /";
# replace any other non-alpha, non-numeric, non-comma, non-space with nothing:
$search[1] = "/[^a-zA-Z0-9, ]/";
$replace[1] = "//";
# do the replace:
$cleanString = preg_replace($search, $replace, $string);
echo $cleanString;
[/code]
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