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var_dump

Dumps information about a variable (PHP 4, PHP 5)
void var_dump ( mixed expression [, mixed expression [, ...]] )

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

In PHP 5 all public, private and protected properties of objects will be returned in the output.

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).

Parameters

expression

The variable you want to export.

Return Values

No value is returned.

Examples

Example 2604. var_dump() example

<?php
$a
= array(1, 2, array("a", "b", "c"));
var_dump($a);
?>

The above example will output:

array(3) {
 [0]=>
 int(1)
 [1]=>
 int(2)
 [2]=>
 array(3) {
   [0]=>
   string(1) "a"
   [1]=>
   string(1) "b"
   [2]=>
   string(1) "c"
 }
}
<?php

$b
= 3.1;
$c = true;
var_dump($b, $c);

?>

The above example will output:

float(3.1)
bool(true)