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                            如果在一個函數中調用`return`語句，將立即結束此函數的執行并將它的參數作為函數的值返回。

~~~php
<?php

function sayHello()
{
    return "Hello";
    echo "World";//不會被執行
}
echo sayHello();//Hello

~~~

`return`可以不接任何參數。

~~~php
<?php

function sayHello()
{
    return;
}
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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