Making arguments be passed by reference : Parameters « Functions « PHP






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  3. Parameters

Making arguments be passed by reference

 
<?
function add_some_extra(&$string) {
    $string .= 'and something extra.';
}
$str = 'This is a string, ';
add_some_extra($str);
echo $str; 

function foo ($bar) {
$bar .= ' and something extra.';
}
$str = 'This is a string, ';
foo ($str);
echo $str; 
foo (&$str);
echo $str; 
?>








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7.Using a Function Call to Pass an Argument to a Function by Reference
8.Declaring a Function That Requires Arguments
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10.A Function with an Optional Argument
11.Accessing Function Parameters
12.All optional arguments
13.Capturing a return value
14.Changing argument values
15.Defining and Calling a two-argument function,
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17.Function with two parameters
18.Creating Functions That Take a Variable Number of Arguments
19.Creating a capitalize function with a default parameter $each
20.Default Parameters
21.Define whether a variable is passed by value or reference
22.Passing By Reference
23.Using Optional Parameters