相关疑难解决方法(0)

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This is a collection of questions that come up every now and then about syntax in PHP. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.

Why is this?

It used to be hard to find questions about operators and other syntax tokens.¹
The main idea is to have links to existing questions on Stack Overflow, so it's easier for us to reference them, not to copy over content from …

在PHP中,运算符!=和<>运算符之间有什么区别吗？

在手册中,它指出:

$a != $b    Not equal   TRUE if $a is not equal to $b after type juggling.
$a <> $b    Not equal   TRUE if $a is not equal to $b after type juggling.

我想没有太大的差异,但我很好奇.

以下代码有什么作用？PHP手册中某些内容的链接也很不错.

if ($_SERVER['SERVER_PORT'] <> 443) {
    doSomething();
}

什么是<>运营商意味着什么？

它是否相同!=(不相等)？

示例代码

$foo = 'text';

if ($foo <> 'photo') {
    echo 'foo';
}
else {
    echo 'bar';
}