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                **一.參數結尾逗號用法** #PHP 8.0語法允許在參數列表和閉包use列表中留下逗號. 1.函數或方法 ~~~ function foo(string $foo, string $bar,) {} ~~~ 2.閉包函數 ~~~ function() use ($foo, $bar,) {} ~~~ **二.實例** #fn()=>{}語法不支持use關鍵字 1.參數列表 ~~~ function show($a,$b,){ return $a+$b; } echo show(1,2); ~~~ 2.閉包函數fn參數列表 ~~~ $fn=function($a,$b,){ return $a+$b; }; echo $fn(2,3); ~~~ 3.閉包函數use參數列表 ~~~ $i=3; $j=4; $fn=function($a,$b,) use ($i,$j,){ return $a+$b+$i+$j; }; echo $fn(1,2); ~~~
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