PRINT_R(3) 1 PRINT_R(3)
print_r - Prints human-readable information about a variable
SYNOPSIS
mixed print_r (mixed $expression, [bool $return = false])
DESCRIPTION
print_r(3) displays information about a variable in a way that's readable by humans.
print_r(3), var_dump(3) and var_export(3) will also show protected and private properties of objects with PHP 5. Static class members will
not be shown.
PARAMETERS
o $expression
- The expression to be printed.
o $return
- If you would like to capture the output of print_r(3), use the $return parameter. When this parameter is set to TRUE, print_r(3)
will return the information rather than print it.
RETURN VALUES
If given a string, integer or float, the value itself will be printed. If given an array, values will be presented in a format that shows
keys and elements. Similar notation is used for objects.
When the $return parameter is TRUE, this function will return a string. Otherwise, the return value is TRUE.
NOTES
Note
When the $return parameter is used, this function uses internal output buffering so it cannot be used inside an ob_start(3) callback
function.
EXAMPLES
Example #1
print_r(3) example
<pre>
<?php
$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));
print_r ($a);
?>
</pre>
The above example will output:
<pre>
Array
(
[a] => apple
[b] => banana
[c] => Array
(
[0] => x
[1] => y
[2] => z
)
)
</pre>
Example #2
$return parameter example
<?php
$b = array ('m' => 'monkey', 'foo' => 'bar', 'x' => array ('x', 'y', 'z'));
$results = print_r($b, true); // $results now contains output from print_r
?>
SEE ALSO
ob_start(3), var_dump(3), var_export(3).
PHP Documentation Group PRINT_R(3)
