How to get numeric index of associative array in PHP?

To get the numeric index of an associative array, the code is as follows−

Example

 Live Demo

<?php
   $arr = array( "a"=>"5", "b"=>"20", "c"=>"35", "d"=>"55");
   $keys = array_keys( $arr );
   echo "Array key and value...
";
   for($x = 0; $x < sizeof($arr); $x++ ) {
      echo "key: ". $keys[$x] . ", value: ". $arr[$keys[$x]] . "
";
   }
?>

Output

This will produce the following output−

Array key and value...
key: a, value: 5
key: b, value: 20
key: c, value: 35
key: d, value: 55

Example

Let us now see another example−

 Live Demo

<?php
   $arr = array( "p"=>"150", "q"=>"100", "r"=>"120", "s"=>"110");
   $keys = array_keys( $arr );
   echo "Array key and value...
";
   for($x = 0; $x < sizeof($arr); $x++ ) {
      echo "key: ". $keys[$x] . ", value: ". $arr[$keys[$x]] . "
";
   }
   $arr[$keys[3]] = "25";
   echo "
Updated Array key and value...
";
   for($x = 0; $x < sizeof($arr); $x++ ) {
      echo "key: ". $keys[$x] . ", value: ". $arr[$keys[$x]] . "
";
   }
?>

Output

This will produce the following output−

Array key and value...
key: p, value: 150
key: q, value: 100
key: r, value: 120
key: s, value: 110
Updated Array key and value...
key: p, value: 150
key: q, value: 100
key: r, value: 120
key: s, value: 25