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PHP数组占多大内存

 1 year ago
source link: http://abcdxyzk.github.io/blog/2022/09/24/lang-php-mem/
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PHP数组占多大内存

2022-09-24 20:20:00

http://t.zoukankan.com/sailrancho-p-3892291.html

简单的写一个代码

<?php
$m1 = memory_get_usage();

$arr = array(
);

$m2 = memory_get_usage();

$arr2 = array(
    'testa'=>'hello world1',
    'testb'=>'hello world2',
);

$m3 = memory_get_usage();

echo $m1.PHP_EOL;
echo $m2.PHP_EOL;
echo 'usage: '.($m2-$m1), PHP_EOL;
echo $m3.PHP_EOL;
echo 'usage: '.($m3-$m2), PHP_EOL;
92216
92656
usage: 440
93432
usage: 776

memory_usage的单位是B(Byte), 也就是一个空数组是440B, 有内容以后是776B， 还是很占内存的。


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