echo 76 <=> '76 trombones';
“太空船”操作符的两侧相等,所以答案是0。在这种情况下,PHP会将'76 trombones'转换为76,因为字符串以'76'开头。试一试吧! 对于 PHP 8.0 及更高版本,答案是 [x] -1,对于之前的版本,答案是 [x] 0。 PHP 8 更改了数字与非数字字符串之间非严格比较的方式。
$encrypted = shal($password);
$encrypted = crypt($password, \$salt);
$encrypted = md5($password);
$encrypted = password_hash($password, PASSWORD_DEFAULT);
$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL); if ($email === false) { $emailErr = "请重新输入有效的电子邮件"; }
1 <?php 2 $count = 0; 3 $_xval = 5; 4 $_yval = 1.0; 5 $some_string = "Hello there!"; 6 $some_string = "How are you?"; 7 $will i work = 6; 8 $3blindmice = 3; 9 ?>
$string_name = "testcookie"; $string_value = "This is a test cookie"; $expiry_info = info()+259200; $string_domain = "localhost.localdomain";
$_REQUEST
。 $_COOKIES
数组。 setcookie()
的调用。 $total = 2 + 5 * 20 - 6 / 3
$dog = new Pet;
$horse = (new Pet);
$cat = new Pet();
方式是什么?
if (!$_SESSION['myusername']) { header('locaton: /login.php'); exit; }
/* This is a comment */
ignore_user_abort( )
函数设置客户端断开连接是否应该中止脚本执行。作为 Web 开发人员,你会在什么情况下使用这个函数?array_reduce()
接受一个回调函数,该函数接受每次迭代传递的值和数组中的当前项,并将数组减少为单个值。哪个代码示例将对提供的数组中的值进行求和并输出? <?php
echo array_reduce([1, 2, 5, 10, 11], function ($item, $carry) {
$carry = $carry + $item;
});
?>
<?php
echo array_reduce([1, 2, 5, 10, 11], function ($carry, $item) {
return $carry = $item + $item;
});
?>
<?php
array_reduce([11 2, 5, 10, 11], function ($item, $carry) {
echo $carry + $item;
});
?>
<?php
echo array_reduce([1, 2, 5, 10, 11], function ($carry, $item) {
return $carry += $item;
});
?>
class MyClass {
public function _construct()
{
echo 'Winter is almost over!'."\n";
}
}
$userclass = new MyClass;
class MyClass {
public function _construct()
{
echo 'Winter is almost over!.."\n";
}
}
$userclass = new MyClass;
class MyClass {
public function _construct()
{
echo 'Winter is almost over!.."\n";
}
}
$userclass = new MyClass;
class MyClass {
public function _construct()
{
echo 'Winter is almost over!'."n";
}
}
$userclass = MyClass;