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75 lines
1.7 KiB
PHP
75 lines
1.7 KiB
PHP
--TEST--
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Test uasort() function : usage variations - sort array with reference variables
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--FILE--
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<?php
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/* Prototype : bool uasort(array $array_arg, string $cmp_function)
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* Description: Sort an array with a user-defined comparison function and maintain index association
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* Source code: ext/standard/array.c
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*/
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/*
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* Testing uasort() with 'array_arg' containing different reference variables
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*/
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// comparision function
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/* Prototype : int cmp_function(mixed $value1, mixed $value2)
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* Parameters : $value1 and $value2 - values to be compared
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* Return value : 0 - if both values are same
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* 1 - if value1 is greater than value2
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* -1 - if value1 is less than value2
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* Description : compares value1 and value2
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*/
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function cmp_function($value1, $value2)
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{
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if($value1 == $value2) {
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return 0;
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}
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else if($value1 > $value2) {
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return 1;
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}
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else {
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return -1;
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}
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}
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echo "*** Testing uasort() : 'array_arg' with elements as reference ***\n";
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// different variables which are used as elements of 'array_arg'
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$value1 = -5;
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$value2 = 100;
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$value3 = 0;
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$value4 = &$value1;
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// array_args an array containing elements with reference variables
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$array_arg = array(
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0 => 10,
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1 => &$value4,
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2 => &$value2,
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3 => 200,
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4 => &$value3,
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);
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echo "-- Sorting 'array_arg' containing different references --\n";
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var_dump( uasort($array_arg, 'cmp_function') ); // expecting: bool(true)
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var_dump($array_arg);
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echo "Done"
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?>
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--EXPECTF--
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*** Testing uasort() : 'array_arg' with elements as reference ***
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-- Sorting 'array_arg' containing different references --
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bool(true)
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array(5) {
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[1]=>
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&int(-5)
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[4]=>
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&int(0)
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[0]=>
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int(10)
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[2]=>
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&int(100)
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[3]=>
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int(200)
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}
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Done
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