PHP Memory consumption

Because the variable occupies a different space, so it consumes a different amount of memory, in PHP we can use "memory_get_usage" to get the current consumption of PHP memory. But depending on the operating system, PHP version, and how PHP works, the output may be different.

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<?php echo $m1 = memory_get_usage(); echo "<br />";  $var_string = "789123"; echo $m2 = memory_get_usage()-$m1; echo "<br />";  $n = 789123; echo $m3 = memory_get_usage()-$m1-$m2; echo "<br />";  $f = 789123.00; echo $m4 = memory_get_usage()-$m1-$m2-$m3; echo "<br />";  $var_array = array("789123"); echo $m5 = memory_get_usage()-$m1-$m2-$m3-$m4; ?>

The initialization consumes 370304, the string consumes 184, the integer consumes 160, the float consumes 168, and the array consumes 352.