PHP var_dump function

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var_dump

(PHP 3 >= 3.0.5, PHP 4, PHP 5)

var_dump — Dumps information about a variableDescriptionvoid 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 1. var_dump() example

$a = array(1, 2, array("a", "b", "c"));
var_dump($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”
}
}

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

The above example will output:

float(3.1)
bool(true)

See Also

var_export()print_r()


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Published:
2.26.07 / 12am
Category:
PHP Functions
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