Get PHP memory consumption memory_get_usage function usage

One, function prototype
int Memory_get_usage ([bool $real _usage = false])

Second, version compatible
PHP 4 >= 4.3.2, PHP 5

Iii. basic usages and examples
1, get the current memory consumption

The code is as follows	Copy Code
<?php Echo Memory_get_usage (); $var = Str_repeat ("Liuhui", 10000); Echo Memory_get_usage (); Unset ($var); Echo Memory_get_usage (); ?>

Output respectively: 62328 122504 62416
Note: the Memory_get_usage () function outputs a value of bytes units

2, Format memory_get_usage () output

The code is as follows	Copy Code
<?php function Convert ($size) { $unit =array (' B ', ' KB ', ' MB ', ' GB ', ' TB ', ' PB '); Return @round ($size/pow (1024, ($i =floor (log ($size, 1024))), 2). ' '. $unit [$i]; } echo Convert (Memory_get_usage (true)); ?>

Output: 256 kb

3, the Custom function gets the size of the array or variable value

code is as follows	copy code
<?php Function Array_size ($arr) {   ob_start ();   Print_r ($arr);   $mem = ob_get_contents ();   Ob_end_clean ();   $mem = preg_replace ("/N +/", "", $mem);   $mem = strlen ($MEM);   return $mem; } $memEstimate = Array_size ($GLOBALS); ?