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 returns structured information about one or more expressions
that includes its type and value. Arrays are explored
recursively with values indented to show structure.
提示:
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,在將之存入一個
字串(舉例說明)。
Compare var_dump() to
print_r().
範例 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)
*/
?>
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