1

I am not good with preg_match or similar functions which are not deprecated.

Here are 2 strings:

  1. /Cluster-Computers-c-10.html

  2. /Mega-Clusters-c-15_32.html

I would to find out:

In number 1 example, how to get the value between -c- and .html (the value in the example is 10). The value is always an integer (numeric)

In number 2 example, how to get the value between -c- and .html (the value in the example is 15_32) . The value is always an integer seperated by _

Basically what I want to do is check if a string has either c-10.html or c-15_32.html and get the value and pass it to the database.

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4 Answers 4

Reset to default
3

You can do:

preg_match('/-c-(\d+(?:_\d+)?)\.html$/i',$str);

Explanation:

-c-     : A literal -c-
(       : Beginning of capturing group
 \d+    : one or more digits, that is a number
 (?:    : Beginning of a non-capturing group
   _\d+ : _ followed by a number
 )      : End of non-capturing group
 ?      : Makes the last group optional
)       : End of capturing group
\.      : . is a metacharacter to match any char (expect newline) to match 
          a literal . you need to escape it.
html    : a literal html
$       : End anchor. Without it the above pattern will match any part 
          of the input string not just the end.

See it

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2 Comments

Thanks for that. I just wanted to confirm that if the url string has parameters such as mydomain.com/Cluster-Computers-c-10.html?action=blah
Also, just wanted to confirm that $matches will always have an array with 2 strings? or can it be more or less than 2 ever? I am asking because I need to assign $path = $matches[1]; and want to make sure it will always be same.
3 
preg_match('~-c-(.*?)\.html$~', $str, $matches)
var_dump($matches);
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3 Comments

Thanks for that. I just wanted to confirm that if the url string has parameters such as mydomain.com/Cluster-Computers-c-10.html?action=blah
Also, just wanted to confirm that $matches will always have an array with 2 strings? or can it be more or less than 2 ever? I am asking because I need to assign $path = $matches[1]; and want to make sure it will always be same.
@Eddy: it can be 0 or 2 items there. 0 - when nothing matched, 2 - when something matched. So put if (isset($matches[1])) { $path = ...; } else { nothing matched }
1 
/-c-(\d+(?:_\d+)?)\.html$/i

-c- look for -c-
(\d+(?:_\d+)?) match number or number-underscore-number
\.html a period and trailing html
$ force it to match the end of the line
i case-insensitive match

Example:

<?php
  header('Content-Type: text/plain');
  $t = Array(
    '1) /Cluster-Computers-c-10.html',
    '2) /Mega-Clusters-c-15_32.html'
  );
  foreach ($t as $test){
    $_ = null;
    if (preg_match('/-c-(\d+(?:_\d+)?)\.html$/i',$test,$_))
      var_dump($_);
    echo "\r\n";
  }
?>

output: 

array(2) {
  [0]=>
  string(10) "-c-10.html"
  [1]=>
  string(2) "10"
}

array(2) {
  [0]=>
  string(13) "-c-15_32.html"
  [1]=>
  string(5) "15_32"
}

Working Code: http://www.ideone.com/B70AQ

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Comments

0

The simplest way I see would be:

preg_match( '/-c-([^.]+)\.html/i', $url, $matches );
var_dump( $matches );
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1 Comment

. in the [] don't need to be escaped.

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