Be careful comparing ReflectionParameter::getType() and gettype() as they will not return the same results for a given type.
string - string // OK
int - integer // Type mismatch
bool - boolean // Type mismatch
array - array // OK
(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"
| 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'。
|
示例 #1 gettype() 示例
<?php
$data = array(1, 1., NULL, new stdClass, 'foo');
foreach ($data as $value) {
echo gettype($value), "\n";
}
?>以上示例的输出类似于：
integer double NULL object string
Be careful comparing ReflectionParameter::getType() and gettype() as they will not return the same results for a given type.
string - string // OK
int - integer // Type mismatch
bool - boolean // Type mismatch
array - array // OKSince ReflectionParameter::getType() and gettype() do not return the same type name, you can leverage the strpos() function.
use DateTime;
use ReflectionClass;
$myVar = 45;
# get the type of your variable
$varType = gettype($myVar);
$cls = new ReflectionClass(DateTime::class);
$mth = $cls->getMethod('setDate');
$params = $mth->getParameters();
foreach($params as $param) {
$paramTypes = $param instanceof ReflectionUnionType
? $param->getTypes()
: [$param];
foreach($paramTypes as $paramType) {
if (strpos($paramType, $varType) >= 0) {
echo "Parameter '". $paramType->getName() ."' has type '". $paramType->getType() ."' which matches the variable's type of '$varType'.\n";
}
}
}