(PHP 4, PHP 5, PHP 7, PHP 8)
gettype — 获取变量的类型
value要检查类型的变量。
返回字符串，可能值为：
"boolean"
"integer"
"double"
（由于历史原因，如果是浮点型，则返回 "double"，而不仅仅是 "float"）
"string"
"array"
"object"
"resource"
"resource (closed)" 自 PHP 7.2.0 起
"NULL"
"unknown type"
Example #1 gettype() 示例
<?php
$data = array(1, 1., NULL, new stdClass, 'foo');
foreach ($data as $value) {
echo gettype($value), "\n";
}
?>
以上例程的输出类似于：
integer double NULL object string
| 版本 | 说明 |
|---|---|
| 7.2.0 |
现在，已关闭的资源报告为 'resource (closed)'。
此前，已关闭的资源报告为 'unknown type'。
|
Here is something that had me stumped with regards to gettype and is_object.
Gettype will report an incomplete object as such, whereas is_object will return FALSE.
<?php
if (!is_object($incomplete_obj)) {
echo 'This variable is not an object, it is a/an ' . gettype($incomplete_obj);
}
?>
Will print:
This variable is not an object, it is a/an object