get_debug_type
(PHP 8)
get_debug_type — Gets the type name of a variable in a way that is suitable for debugging
Beschreibung
Returns the resolved name of the PHP variable value.
This function will resolve objects to their class name, resources to their
resource type name, and scalar values to their common name as would be used in type
declarations.
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.
Parameter-Liste
-
value -
The variable being type checked.
Rückgabewerte
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"
|
Anonymous classes are those created through the $x = new class { ... } syntax |
Beispiele
Beispiel #1 get_debug_type() example
<?php
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;
$fp = fopen(__FILE__, 'rb');
echo get_debug_type($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;
?>
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
null bool int float string array resource (stream) resource (closed) stdClass class@anonymous
Siehe auch
- gettype() - Liefert den Datentyp einer Variablen
- get_class() - Ermittelt den Klassennamen eines Objekts
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