» google_pagerank()
  » preg_replace()
  » htmlentities()
  » imagecreatefrompng()
  » site_pageranks()
  » imagepng()
  » imagestring()
  » imagedestroy()
  » header()
  » imagecolorallocate()
  » preg_match()
  » session_start()
  » getimagesize()
  » ob_start()
  » urlencode()
  » flush()
  » strpos()
  » str_replace()
  » fopen()
  » nl2br()
  » array2vars()
  » htmlspecialchars()
  » preg_match_all()
  » setcookie()
  » strstr()
  » ob_flush()
  » ereg()
  » preg_split()
  » ereg_replace()
  » var_dump()

 » Weblog Community
 » Listen to Podcasts
 » Rock Music Community - meet fans

Become a sponsor for $15/month. Link is sitewide - PR5 homepage, 20+ PR4 pages, 90+ PR3 pages. Email Tabpole[AT]Gmail[DOT]com.

(PHP 4, PHP 5)

print_r --  Prints human-readable information about a variable

Description

bool print_r ( mixed expression [, bool return] )

print_r() displays information about a variable in a way that's readable by humans. 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 object s. print_r() and var_export() will also show protected and private properties of objects with PHP 5, on the contrary to var_dump() .

Remember that print_r() will move the array pointer to the end. Use reset() to bring it back to beginning.

<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>

If you would like to capture the output of print_r() , use the return parameter. If this parameter is set to TRUE , print_r() will return its output, instead of printing it (which it does by default).

Example 1. 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
?>

Related Function(s)

var_export()

var_dump()

reset()

ob_start()