In certain cases, you may require to pass different number of arguments to a function in PHP scripts. Let us consider a case where you want to calculate average of a set of values using a function. Number of values in the set may vary in each call to the function. PHP provides a mechanism to pass different number of arguments to a function and process the arguments from the function by using the following functions.
func_num_args() - Returns the number of arguments passes to the function
func_get_args() - Returns the arguments passed to the function as an array
func_get_arg($arg_num) - Returns the argument at the $arg_num th position or index . Starting index is 0.
func_num_args() - Returns the number of arguments passes to the function
func_get_args() - Returns the arguments passed to the function as an array
func_get_arg($arg_num) - Returns the argument at the $arg_num th position or index . Starting index is 0.
varargs.php
<html>
<head>
<title>How to pass variable number of arguments to a function in PHP?</title>
</head>
<body>
<?php
function calc_average() {
$args = func_get_args();
$sum = 0;
$avg = 0;
$num_args = func_num_args();
foreach($args as $value){
$sum +=$value;
}
if ($num_args>0)
$avg = $sum / $num_args;
return $avg;
}
echo "Average :" . calc_average(10,22,34,55);
?>
</body>
</html>
<head>
<title>How to pass variable number of arguments to a function in PHP?</title>
</head>
<body>
<?php
function calc_average() {
$args = func_get_args();
$sum = 0;
$avg = 0;
$num_args = func_num_args();
foreach($args as $value){
$sum +=$value;
}
if ($num_args>0)
$avg = $sum / $num_args;
return $avg;
}
echo "Average :" . calc_average(10,22,34,55);
?>
</body>
</html>
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