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PHP RegEx: Match A String

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In this tutorial I will show you the basic in regex.

In brief discussion.

Regex is considered a method of matching pattern within a string. In PHP usually used PCRE or "Perl Compatible Regular Expressions".

Let's see a sample to print a string.

  1. <?php
  2.  
  3. // create a string
  4. $string = 'abcdefghijklmnopqrstuvwxyz0123456789';
  5. // echo our string
  6. echo $string;
  7.  
  8. ?>

The above code are printing "abcdefghijklmnopqrstuvwxyz0123456789". Now were going to match the character "xyz" using regex.

  1. <?php
  2.  
  3. // create a string
  4. $string = 'abcdefghijklmnopqrstuvwxyz0123456789';
  5. echo preg_match("/xyz/", $string);
  6.  
  7. ?>

The code above will output "1" because the character "xyz" are matches to the string given. Then the preg_match will output zero "0" if it could not matches to the string given.

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