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PHP - Function preg_grep()


array preg_grep ( string $pattern, array $input [, int $flags] );

Definition and Usage

Returns the array consisting of the elements of the input array that match the given pattern.

If flag is set to PREG_GREP_INVERT, this function returns the elements of the input array that do not match the given pattern.

Return Value

  • Returns an array indexed using the keys from the input array.


Following is the piece of code, copy and paste this code into a file and verify the result.

   $foods = array("pasta", "steak", "fish", "potatoes");
   // find elements beginning with "p", followed by one or more letters.
   $p_foods = preg_grep("/p(\w+)/", $foods);
   print "Found food is " . $p_foods[0];
   print "Found food is " . $p_foods[1];

This will produce the following result −

Found food is pastaFound food is