debug_zval_dump()

debug_zval_dump() — Dumps a string representation of an internal zval structure to output.

Built-in function of PHP 8.5. The manual lists it as available in PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

What it does

Dumps a string representation of an internal zval (Zend value) structure to output. This is mostly useful for understanding or debugging implementation details of the Zend Engine or PHP extensions.

Signature

debug_zval_dump(mixed $value, mixed ...$values): void

Parameters

Return value

No value is returned.

Example

A runnable snippet:

$var1 = 'Hello'; $var1 .= ' World'; $var2 = $var1; debug_zval_dump($var1);

Output:

string(11) "Hello World" refcount(3)

Changelog

See also

var_dump(), debug_backtrace()

All PHP 8.5 built-in functions

Reference card built from the PHP manual page debug_zval_dump() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.