PHP print_r() Function

Print the information about some variables in a more human-readable way:

<?php
$a = array("red", "green", "blue");
print_r($a);

echo "<br>";

$b = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
print_r($b);
?>

Definition and Usage

The print_r() function prints the information about a variable in a more human-readable way.

print_r( variable, return);

Parameter	Description
variable	Required. Specifies the variable to return information about
return	Optional. When set to true, this function will return the information (not print it). Default is false

Return Value:	If variable is integer, float, or string, the value itself will be printed. If variable is array or object, this function returns keys and elements. If the return parameter is set to TRUE, this function returns a string
Return Type:	True or String
PHP Version:	4.0+