Detailed explanation of php Math function

Mathematics (Math) Function can handle values ​​in the range of integer and float.

This article mainly introduces PHP built-in Math function efficiency test, tests the execution time of related PHP built-in mathematical operation functions in the form of examples, and analyzes its For operational efficiency, friends who need it can refer to the

code as follows:

$start = microtime(TRUE);    
for ($i=0; $i < 200000; $i++){    
    $s = 0;
    for ($j=0; $j < 3; $j++){     
       $s += ($j+$i+1) * ($j+$i+1);
    }    
}    
echo microtime(TRUE) – $start;  // output: 0.33167719841003

Then compare the code and results using the Math function, the code is as follows:

$start = microtime(TRUE);    
for ($i=0; $i < 200000; $i++){
    $s = 0;
    for ($j=0; $j < 3; $j++){
       $s += pow($j+$i+1, 2);
    }
}
echo microtime(TRUE) – $start;   // output: 0.87528896331787

See that there is no , efficiency increased by 100%! ! I used to think that PHP's built-in Math was faster, but I didn't know it. The absolute value abs, the maximum value max, the minimum value min, etc. are not as efficient as the native if judgment.

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