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Implement swap function (Bug #70736) #1609

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Implement swap function (Bug #70736) #1609

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1 change: 1 addition & 0 deletions ext/standard/php_var.h
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ PHP_FUNCTION(serialize);
PHP_FUNCTION(unserialize);
PHP_FUNCTION(memory_get_usage);
PHP_FUNCTION(memory_get_peak_usage);
PHP_FUNCTION(swap);

PHPAPI void php_var_dump(zval *struc, int level);
PHPAPI void php_var_export(zval *struc, int level);
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38 changes: 38 additions & 0 deletions ext/standard/tests/general_functions/swap_01.phpt
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@@ -0,0 +1,38 @@
--TEST--
swap function test
--FILE--
<?php
$value1 = 2;
$value2 = 'abc';

var_dump(swap($value1, $value2));
var_dump($value1);
var_dump($value2);

class obj1 {
public $value = 2;
}

class obj2 {
public $value = 'abc';
}

$value1 = new obj1;
$value2 = new obj2;

var_dump(swap($value1, $value2));
var_dump($value1->value);
var_dump($value2->value);

var_dump(swap());
var_dump(swap($value1, $value2, $value2));
?>
--EXPECT--
bool(true)
string(3) "abc"
int(2)
bool(true)
string(3) "abc"
int(2)
bool(false)
bool(false)
21 changes: 21 additions & 0 deletions ext/standard/var.c
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Expand Up @@ -1121,6 +1121,27 @@ PHP_FUNCTION(memory_get_peak_usage) {
}
/* }}} */

/* {{{ proto bool swipe(mixed var1, mixed var2)
Swaps the value of var1 and var2. */
PHP_FUNCTION(swap)
{
zval temp, *val1, *val2;

if (zend_parse_parameters(ZEND_NUM_ARGS(), "zz", &val1, &val2) == FAILURE) {
RETURN_FALSE;
}

ALLOC_INIT_ZVAL(temp);

ZVAL_COPY_VALUE(temp, val1);
ZVAL_COPY_VALUE(val1, val2);
ZVAL_COPY_VALUE(val2, temp);

RETURN_TRUE;

}
/* }}} */

/*
* Local variables:
* tab-width: 4
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