(PHP4 )
preg_grep -- 
     Return array entries that match the pattern
    
Description
array preg_grep (string pattern, array input)
     preg_grep() returns the array consisting of
     the elements of the input array that match
     the given pattern.
     
| Example 1. preg_grep() example | 
// return all array elements
// containing floating point numbers
$fl_array = preg_grep ("/^(\d+)?\.\d+$/", $array);
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