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Current File : /proc/self/root/home/b8009/php-5.6.22/ext/standard/tests/array/usort_variation7.phpt
--TEST--
Test usort() function : usage variations - Anonymous comparison function
--FILE--
<?php
/* Prototype  : bool usort(array $array_arg, string $cmp_function)
 * Description: Sort an array by values using a user-defined comparison function 
 * Source code: ext/standard/array.c
 */

/*
 * Pass an anonymous comparison function as $cmp_function argument to test behaviour()
 */

echo "*** Testing usort() : usage variation ***\n";

$cmp_function = 'if($value1 == $value2) {return 0;} else if($value1 > $value2) {return 1;} else{return -1;}';

$array_arg = array(0 => 100, 1 => 3, 2 => -70, 3 => 24, 4 => 90);

echo "\n-- Anonymous 'cmp_function' with parameters passed by value --\n";
var_dump( usort($array_arg, create_function('$value1, $value2',$cmp_function) ) );
var_dump($array_arg);

$array_arg = array("b" => "Banana", "m" => "Mango", "a" => "Apple", "p" => "Pineapple");

echo "\n-- Anonymous 'cmp_function' with parameters passed by reference --\n";
var_dump( usort($array_arg, create_function('&$value1, &$value2', $cmp_function) ) );
var_dump($array_arg);
?>
===DONE===
--EXPECTF--
*** Testing usort() : usage variation ***

-- Anonymous 'cmp_function' with parameters passed by value --
bool(true)
array(5) {
  [0]=>
  int(-70)
  [1]=>
  int(3)
  [2]=>
  int(24)
  [3]=>
  int(90)
  [4]=>
  int(100)
}

-- Anonymous 'cmp_function' with parameters passed by reference --
bool(true)
array(4) {
  [0]=>
  string(5) "Apple"
  [1]=>
  string(6) "Banana"
  [2]=>
  string(5) "Mango"
  [3]=>
  string(9) "Pineapple"
}
===DONE===

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