About the cool operation of the new match statement in PHP8-PHP8-php.cn

About the cool operation of the new match statement in PHP8

藏色散人

Release： 2023-02-17 12:28:01

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PHP8 new syntax: match [more exciting anonymous function operation]

PHP8 has a new syntax that is very useful, which is the match statement. The match statement is similar to the original switch, but more strict and convenient than switch.

The original switch statement code is as follows:

function getStr( $strType ){
    switch( $strType ){
        case 1:
            $str = &#39;one&#39;;
            break;
        case 2:
            $str = &#39;two&#39;;
            break;
        default :
            $str = &#39;error&#39;;
    }
    return $str;
}
//当输入数值 1 和 字符 &#39;1&#39; 不会进行类型判断
echo getStr(1); //one
echo getStr(&#39;1&#39;); //one
echo getStr(2); //two
echo getStr(&#39;2&#39;); //two

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After replacing it with the match statement:

function getStr( $strType ){
    return match( $strType ){
        1 => &#39;number one&#39;,
        &#39;1&#39; => &#39;string one&#39;,
        default => &#39;error&#39;,
    };
}
//可以看出输入数值 1 跟字符 `1` 返回的值是不同的
echo getStr(1); //number one
echo getStr(&#39;1&#39;); //string one

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Sao Operation

function getStr( $strType ){
    return match( $strType ){
        1 => (function(){
            return &#39;number one&#39;;
        })(),
        &#39;1&#39; => (function(){
            return &#39;string one&#39;;
        })(),
        default => &#39;error&#39;,
    };
}
//虽然这种代码风格也能行的通，但是总感觉哪里怪怪的
echo getStr(1); //number one
echo getStr(&#39;1&#39;); //string one

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Summary: PHP8’s new syntax match is more convenient and strict than the original switch syntax

Recommended study: "PHP8 Tutorial"

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