(PHP 4, PHP 5)
var_dump — Dumps information about a variable
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.
任何直接把輸出到瀏覽器的結果,可使用輸出控制函數來擷取此函數的輸出,再將之存入一個字串(舉例說明)。
The variable you want to export.
No value is returned.
Example#1 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)