var_dump

Dumps information about a variable (PHP 3>= 3.0.5, PHP 4 )
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 1011. var_dump() example

copy to clipboard
<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>

This HTML Help has been published using the chm2web software.