Php
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Function
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R
Q
Php Function Reference
Function arguments, passed by reference Default function arguments function find($x, &$y = null) {} find("abc", "a", $count); echo $count; // 2
Reference
Function arguments can be passed by reference.
/**
* Function arguments, passed by reference
*/
function findAndCount($s, $char, &$j) // Look Here
{
$i = 0;
while($i < strlen($s)) {
if ($s[$i] == $char)
$j++;
$i++;
}
}
findAndCount("abca", "a", $count);
echo $count; // 2
Default values
PHP allows default values, even when parameters are declared as by-reference.
/**
* Default function arguments
*/
function test($x, &$y = null)
{
$y = 100;
}
$x = 1;
$y = 2;
test($x, $y);
echo $y; // 100
➥ Questions