php man page for print_r

Query: print_r

OS: php

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

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)
Related Man Pages
array_filter(3) - php
array_fill(3) - php
ini_get_all(3) - php
print_r(3) - php
scandir(3) - php
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