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                            PHP計算搜索過程所用的時間
```
<?php 

$time1 = ceil(microtime(true) * 1000);

$a = 0;
for ($x = 0; $x <= 700000; $x++) {
  $a += 1;
}

echo $a . '<br/>';
$time2 = ceil(microtime(true) * 1000);

$time_search = ($time2 - $time1)/1000;
echo $time_search;
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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