- PHP 手册
- 函数参考
- 其它基本扩展
- SPL Types
The SplString class
(PECL spl_types >= 0.1.0)
简介
The SplString class is used to enforce strong typing of the string type.
类摘要
SplString extends SplType { /* Constants */ const string __default = '' ; /* 继承的方法 */ SplType::__construct ([ mixed$initial_value
[, bool $strict
]] )
}
预定义常量
SplString::__default
范例
Example #1 SplString usage example
<?php
$string = new SplString("Testing");
try {
$string = array();
} catch (UnexpectedValueException $uve) {
echo $uve->getMessage() . PHP_EOL;
}
var_dump($string);
echo $string; // Outputs "Testing"
?>
以上例程会输出：
Value not a string
object(SplString)#1 (1) {
["__default"]=>
string(7) "Testing"
}
Testing
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/class.splstring.php