CODEWITHSUNDEEP
phpregex
user3510768
user3510768

Reputation: 135

Regex get ID from URL

How can I extract ID123 from these given url strings?

my-domain/product/name-product-ID123.html
my-domain/product/name-product-ID123.html/
my-domain/product/name-product-ID123.html?bla=123&some=456

And if not ID, a random string of length equal to 2 (AB, EF, GH, ...)

Can someone please help me?

Upvotes: 0

Views: 1579

Answers (5)

Pedro Lobito
Pedro Lobito

Reputation: 98881

Short and effective:

<?php
$links = <<< LOB
my-domain/product/name-product-ID123.html
my-domain/product/name-product-ID123.html/
my-domain/product/name-product-ID123.html?bla=123&some=456
LOB;

preg_match_all('/-(ID\d+)\./',$links ,$ids, PREG_PATTERN_ORDER);
for ($i = 0; $i < count($ids[1]); $i++) {
    echo $ids[1][$i]."\n";
}
/*
ID123
ID123
ID123
*/
?>

LIVE DEMO:
http://ideone.com/OqhL6b

Explanation:

Match the character “-” literally «-»
Match the regular expression below and capture its match into backreference number 1 «(ID\d+)»
   Match the characters “ID” literally «ID»
   Match a single digit 0..9 «\d+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “.” literally «\.»

Upvotes: 0

defiant91
defiant91

Reputation: 59

This is what I came up with:

(?!-)(ID[0-9]*)(?=\.)

Tested: http://regex101.com/r/rP0vI2

If not "ID", then it would be:

(?!-)([A-Z]{2}[0-9]*)(?=\.)

Tested: http://regex101.com/r/dW8qK0

Upvotes: 0

Andy Lester
Andy Lester

Reputation: 93636

This might not be a job for regexes, but for existing tools in your language of choice. Regexes are not a magic wand you wave at every problem that happens to involve strings. You probably want to use existing code that has already been written, tested, and debugged.

In PHP, use the parse_url function.

Perl: URI module.

Ruby: URI module.

.NET: 'Uri' class

Upvotes: 2

John Bupit
John Bupit

Reputation: 10618

Try this:

(?<=product-)ID[0-9]+(?=\.html)

  • (?<=product-) Positive Lookbehind - Asserts that the ID is preceded by the string product-

  • ID matches the characters ID literally

  • [0-9]+ matches a sequence of digits

  • (?=\.html) Positive Lookahead - Asserts that the ID is followed by .html

Upvotes: 0

tunichgud
tunichgud

Reputation: 41

$zeichenkette = "my-domain/product/name-product-ID123.html"; $suchmuster = '/ID[0-9]{3}/'; preg_match($suchmuster, $zeichenkette, $treffer, PREG_OFFSET_CAPTURE, 3); print_r($treffer);

should print ID123.

Upvotes: 0

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