Why does var_dump show filename and line number?

Question

Just recently var_dump() in PHP (currently using 5.6.23) started to print out the filename as well as the line number before actually dumping my variable. I\'m not aware of

Answer 1

If you don't want the extra data produced by var_dump(), you can use var_export() which will show a stripped-down output.

Here is a test case:

$values = [
    0 => '',
    1 => 'foo',
    2 => null,
    3 => false,
    4 => true,
    5 => 0,
    6 => new stdClass
];

---

var_dump():

foreach ($values as $value) {
    echo var_dump($value) . PHP_EOL;
}

Output of plain old PHP:

string(0) ""
string(3) "foo"
NULL
bool(false)
bool(true)
int(0)
object(stdClass)#1 (0) {
}

Output of PHP XDEBUG:

/var/www/html/test.php:12:string '' (length=0)
/var/www/html/test.php:12:string 'foo' (length=3)
/var/www/html/test.php:12:null
/var/www/html/test.php:12:boolean false
/var/www/html/test.php:12:boolean true
/var/www/html/test.php:12:int 0
/var/www/html/test.php:12:
object(stdClass)[1]

---

var_export():

foreach ($values as $value) {
    echo var_export($value) . PHP_EOL;
}

Output of PHP (plain or with XDEBUG)

''
'foo'
NULL
false
true
0
(object) array(
)