memory_get_peak_usage

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

memory_get_peak_usage — 返回分配给 PHP 内存的峰值

说明

memory_get_peak_usage(bool $real_usage = false): int

返回分配给你的 PHP 脚本的内存峰值字节数。

参数

real_usage: 如果设置为 true 可以获取从系统分配到的真实内存尺寸。如果未设置，或者设置为 false，仅会报告 emalloc() 使用的内存。

返回值

返回内存峰值的字节数。

参见

memory_get_usage() - 返回分配给 PHP 的内存量
memory_reset_peak_usage() - Reset the peak memory usage
memory_limit

发现了问题？

了解如何改进此页面 • 提交拉取请求 • 报告一个错误

＋添加备注

用户贡献的备注 1 note

down

stanislav dot eckert at vizson dot de ¶

8 years ago

memory_get_peak_usage() is used to retrieve the highest memory usage of PHP (or your running script) only. If you need the overall memory usage of the entire system, following function might be helpful. If retrieves the memory usage either in percent (without the percent sign) or in bytes by returning an array with free and overall memory of your system. Tested with Windows (7) and Linux (on an Raspberry Pi 2):

<?php

// Returns used memory (either in percent (without percent sign) or free and overall in bytes)
function getServerMemoryUsage($getPercentage=true)
    {
$memoryTotal = null;
$memoryFree = null;

        if (stristr(PHP_OS, "win")) {
// Get total physical memory (this is in bytes)
$cmd = "wmic ComputerSystem get TotalPhysicalMemory";
            @exec($cmd, $outputTotalPhysicalMemory);

// Get free physical memory (this is in kibibytes!)
$cmd = "wmic OS get FreePhysicalMemory";
            @exec($cmd, $outputFreePhysicalMemory);

            if ($outputTotalPhysicalMemory && $outputFreePhysicalMemory) {
// Find total value
foreach ($outputTotalPhysicalMemory as $line) {
                    if ($line && preg_match("/^[0-9]+\$/", $line)) {
$memoryTotal = $line;
                        break;
                    }
                }

// Find free value
foreach ($outputFreePhysicalMemory as $line) {
                    if ($line && preg_match("/^[0-9]+\$/", $line)) {
$memoryFree = $line;
$memoryFree *= 1024;  // convert from kibibytes to bytes
break;
                    }
                }
            }
        }
        else
        {
            if (is_readable("/proc/meminfo"))
            {
$stats = @file_get_contents("/proc/meminfo");

                if ($stats !== false) {
// Separate lines
$stats = str_replace(array("\r\n", "\n\r", "\r"), "\n", $stats);
$stats = explode("\n", $stats);

// Separate values and find correct lines for total and free mem
foreach ($stats as $statLine) {
$statLineData = explode(":", trim($statLine));

//
                        // Extract size (TODO: It seems that (at least) the two values for total and free memory have the unit "kB" always. Is this correct?
                        //

                        // Total memory
if (count($statLineData) == 2 && trim($statLineData[0]) == "MemTotal") {
$memoryTotal = trim($statLineData[1]);
$memoryTotal = explode(" ", $memoryTotal);
$memoryTotal = $memoryTotal[0];
$memoryTotal *= 1024;  // convert from kibibytes to bytes
}

// Free memory
if (count($statLineData) == 2 && trim($statLineData[0]) == "MemFree") {
$memoryFree = trim($statLineData[1]);
$memoryFree = explode(" ", $memoryFree);
$memoryFree = $memoryFree[0];
$memoryFree *= 1024;  // convert from kibibytes to bytes
}
                    }
                }
            }
        }

        if (is_null($memoryTotal) || is_null($memoryFree)) {
            return null;
        } else {
            if ($getPercentage) {
                return (100 - ($memoryFree * 100 / $memoryTotal));
            } else {
                return array(
"total" => $memoryTotal,
"free" => $memoryFree,
                );
            }
        }
    }

    function getNiceFileSize($bytes, $binaryPrefix=true) {
        if ($binaryPrefix) {
$unit=array('B','KiB','MiB','GiB','TiB','PiB');
            if ($bytes==0) return '0 ' . $unit[0];
            return @round($bytes/pow(1024,($i=floor(log($bytes,1024)))),2) .' '. (isset($unit[$i]) ? $unit[$i] : 'B');
        } else {
$unit=array('B','KB','MB','GB','TB','PB');
            if ($bytes==0) return '0 ' . $unit[0];
            return @round($bytes/pow(1000,($i=floor(log($bytes,1000)))),2) .' '. (isset($unit[$i]) ? $unit[$i] : 'B');
        }
    }

// Memory usage: 4.55 GiB / 23.91 GiB (19.013557664178%)
$memUsage = getServerMemoryUsage(false);
    echo sprintf("Memory usage: %s / %s (%s%%)",
getNiceFileSize($memUsage["total"] - $memUsage["free"]),
getNiceFileSize($memUsage["total"]),
getServerMemoryUsage(true)
    );

?>

The function getNiceFileSize() is not required. Just used to shorten size in bytes.

Note: If you need the server load (CPU usage), I wrote a nice function to get that too: http://php.net/manual/en/function.sys-getloadavg.php#118673

＋添加备注

官方地址：https://www.php.net/manual/en/function.memory-get-peak-usage.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言开发编程 Linux 科技 Elasticsearch HTML/CSS/XML 面试数据库网络 JAVA NoSQL C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Windows Vim Socket Oracle VR MongoDB 运营 Python MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器 Docker

docker-compose启动nginx与php-fpm composer install参数 php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 Composer的Packagist资源 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 PHP 8.1 PHP json解析（json_decode）页面工具 opcache预加载 php $_SERVER中的SERVER_NAME 和HTTP_HOST的区别 mysql面试题 composer基本用法 Packagist / Composer 中国全量镜像支持php7的性能采集扩展 adodb手册 PHP7 mcrypt替代方案两千行PHP学习笔记 php 将字符串中的连续多个空格转换为一个空格

略微加速

PHP官方手册 - 互联网笔记

memory_get_peak_usage

说明

参数

返回值

参见

发现了问题？

用户贡献的备注 1 note