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array_filter()


 <?php

function test_odd($var)
  {
  return($var & 1);
  }

$a1=array(1,3,2,3,4);
print_r(array_filter($a1,"test_odd"));
?>


OutPut:
Array ( [0] => 1 [1] => 3 [3] => 3 )


Syntex:
array_filter(array, callbackfunction, flag)
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