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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                **一.match語法** ``` #比switch改進了很多 match(){ value=>condition1, express=>condition2, default=>condition3, } ``` &emsp; **二.match可返回一個值** ``` #switch是不可以的,而且隱式break $name = match(2) { 1 => 'One', 2 => 'Two', }; echo $name; ``` &emsp; **三.允許多個匹配條件** ``` match($request_method) { 'post' => $this->handlePost(), 'get','head' => $this->handleGet(), }; ``` &emsp; **四.default條件** ``` $name = match(2) { 1 => 'One', 2 => 'Two', default => 'Three', }; echo $name; ``` **五.match表達式必須符合條件** ``` #如果一個也匹配不上會馬上拋出UnhandledMatchError異常錯誤 $a=3; try{ echo match($a){ 1=>'aaa', 2=>'bbb', }; }catch(UnhandledMatchError $e){ echo $e->getMessage(); } ``` &emsp; **六.默認強類型嚴格匹配** ``` #在典型的switch塊中,其大小寫是松散匹配的(==),但在match表達式中,所有匹配的條件都經過嚴格匹配(===). function read(mixed $key): string { return match ($key) { 1 => 'Integer 1', '1' => 'String 1', true => 'Bool true', }; } read(1); read('1'); read(true); ``` &emsp; **七.match匹配任意表達式** ``` #match 表達式允許給定值與表達式匹配. const HOST='localhost'; function show(){ return 5; } $a=5; echo match($a){ HOST=>'aaa', show()=>'bbb', default=>'ccc', }; ``` &emsp; ### **系統的學習PHP** 關注:PHP自學中心,回復相應的關鍵詞,領取以下視頻教程 **PHP各種設計模式視頻教程** 公眾號里回復:20190522 &emsp; #### **還有其他的教程的關鍵詞,請關注公眾號查看每天分享的文章教程的頭部** ![](https://img.kancloud.cn/96/af/96af322d2cdc53d3fbbe981affa60c7f_150x150.jpg)
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