PHP Manual
Prev		Next

var_dump

(PHP 3>= 3.0.5, PHP 4 )

var_dump -- Dumps information about a variable

Description

void var_dump ( mixed expression [, mixed expression [, ...]])

This function displays structured information about one or more expressions that includes its type and value. Arrays are explored recursively with values indented to show structure.

Tip: As with anything that outputs its result directly to the browser, you can use the output-control functions to capture the output of this function, and save it in a string (for example).

Compare var_dump() to print_r().

Example 1. var_dump() example
<pre> <?php $a = array (1, 2, array ("a", "b", "c")); var_dump ($a); /* output: array(3) { [0]=> int(1) [1]=> int(2) [2]=> array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" } } */ $b = 3.1; $c = TRUE; var_dump($b,$c); /* output: float(3.1) bool(true) */ ?> </pre>

Prev	Home	Next
unset	Up	var_export