The print_r Function
The print_r function outputs information about a variable in a human-readable form.
The first parameter is the variable to output, the second parameter (optional) -
if set to true, returns the result as a string instead of outputting it.
Syntax
print_r(mixed $value, bool $return = false);
Example
Let's output information about an array:
<?php
$arr = [1, 2, 3, 4, 5];
print_r($arr);
?>
Code execution result:
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
)
Example
Get the result as a string instead of output:
<?php
$arr = ['a', 'b', 'c'];
$res = print_r($arr, true);
echo $res;
?>
Code execution result:
Array
(
[0] => a
[1] => b
[2] => c
)
Example
Output information about a string:
<?php
$str = 'Hello world';
print_r($str);
?>
Code execution result:
Hello world
See Also
-
the
var_dumpfunction,
which outputs detailed information about a variable -
the
var_exportfunction,
which returns a string representation of a variable
