PHP: get_debug_type - Manual

(PHP 8)

get_debug_type — Gets the type name of a variable in a way that is suitable for debugging

Description

function get_debug_type(mixed $value): string

This function differs from gettype() in that it returns type names that are more consistent with actual usage, rather than those present for historical reasons.

Parameters

value: The variable being type checked.

Return Values

Possible values for the returned string are:

Type + State	Return Value	Notes
null	`"null"`	-
Booleans (`true` or `false`)	`"bool"`	-
Integers	`"int"`	-
Floats	`"float"`	-
Strings	`"string"`	-
Arrays	`"array"`	-
Resources	`"resource (resourcename)"`	-
Resources (Closed)	`"resource (closed)"`	Example: A file stream after being closed with fclose().
Objects from Named Classes	The full name of the class including its namespace e.g. `Foo\Bar`	-
Objects from Anonymous Classes	`"class@anonymous"` or parent class name/interface name if the class extends another class or implements an interface e.g. `"Foo\Bar@anonymous"`	Anonymous classes are those created through the `$x = new class { ... }` syntax

Examples

Example #1 get_debug_type() example

<?php

namespace Foo;

echo get_debug_type(null), PHP_EOL;
echo get_debug_type(true), PHP_EOL;
echo get_debug_type(1), PHP_EOL;
echo get_debug_type(0.1), PHP_EOL;
echo get_debug_type("foo"), PHP_EOL;
echo get_debug_type([]), PHP_EOL;

$fp = fopen('/examples/book.xml', 'rb');
echo get_debug_type($fp), PHP_EOL;

fclose($fp);
echo get_debug_type($fp), PHP_EOL;

echo get_debug_type(new \stdClass), PHP_EOL;
echo get_debug_type(new class {}), PHP_EOL;

interface A {}
interface B {}
class C {}

echo get_debug_type(new class implements A {}), PHP_EOL;
echo get_debug_type(new class implements A,B {}), PHP_EOL;
echo get_debug_type(new class extends C {}), PHP_EOL;
echo get_debug_type(new class extends C implements A {}), PHP_EOL;

?>

The above example will output something similar to:

null
bool
int
float
string
array
resource (stream)
resource (closed)
stdClass
class@anonymous
Foo\A@anonymous
Foo\A@anonymous
Foo\C@anonymous
Foo\C@anonymous

Found A Problem?

vyacheslav dot belchuk at gmail dot com ¶

2 years ago