duangong1979 2015-08-27 13:55
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如何检查PHP数组的密钥然后赋值?

Say I have an array called $myarray like this...

[187] => 12
[712] => 24

Within a loop later in my code, i want to check to see if a key exists in that array and if it does, i want to assign the corresponding value to a variable.

So I'd check like this...

if (array_key_exists($id), $myarray)) { 
            $newvariable= "(the value that goes with the index key)";
            } else {  
            $newvariable="";
            }

So if it checked for key "187", then $newvariable would be assigned "12";

I guess I just need to know what to replace "(the value that goes with the index key)" with. Or maybe I'm approaching it wrong?

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  • duanlu1922 2015-08-27 14:01
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    Just use the value of $id as key:

    if (array_key_exists($id, $myarray)) { 
    
                $newvariable= $myarray[$id];
    
          } else {  
    
                $newvariable="";
    
           }
    
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