PHP RegEx: Case Insensitive

Submitted by ronard on Thursday, March 20, 2014 - 20:02.

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In previous tutorial we match at the beggining of the string given. But that is a case sensitive. If your condition like this: if(preg_match("/^ABC/", $string)) then the value of your string "abc". The script will returned with this message: No match found This is because of case sensitive. But in this script we will make the condition insensitive using regex "i" for insensitive. Shown below: 
  1. <?php // create a string 
  2. $string = 'Ronard'; 
  3. // try to match our pattern 
  4. if(preg_match("/^ron/i", $string)) { 
  5. // echo this is it matches 
  6. echo 'The string begins with Ron'; 
  7. } else { 
  8. // if not match is found echo this line 
  9. echo 'No match found'; } 
  10. ?>
Even if your string given are ROn, rOn, RoN the script will read insensitive and display the message "The string begins with Ron".

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