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PHP statistical time code sharing

Feb 28, 2018 am 11:58 AM
php code share

This article mainly shares with you code examples of PHP statistics time and memory usage, hoping to help everyone.

<?php
/**
 * 记录和统计时间(微秒)和内存使用情况
 * 使用方法:
 * <code>
 * G(&#39;begin&#39;); // 记录开始标记位
 * // ... 区间运行代码
 * G(&#39;end&#39;); // 记录结束标签位
 * echo G(&#39;begin&#39;,&#39;end&#39;,6); // 统计区间运行时间 精确到小数后6位
 * echo G(&#39;begin&#39;,&#39;end&#39;,&#39;m&#39;); // 统计区间内存使用情况
 * 如果end标记位没有定义,则会自动以当前作为标记位
 * 其中统计内存使用需要 MEMORY_LIMIT_ON 常量为true才有效
 * </code>
 * @param string $start 开始标签
 * @param string $end 结束标签
 * @param integer|string $dec 小数位或者m 
 * @return mixed
 */
function G($start,$end=&#39;&#39;,$dec=4) {
    static $_info       =   array();
    static $_mem        =   array();
    if(is_float($end)) { // 记录时间
        $_info[$start]  =   $end;
    }elseif(!empty($end)){ // 统计时间和内存使用
        if(!isset($_info[$end])) $_info[$end]       =  microtime(TRUE);
        if(MEMORY_LIMIT_ON && $dec==&#39;m&#39;){
            if(!isset($_mem[$end])) $_mem[$end]     =  memory_get_usage();
            return number_format(($_mem[$end]-$_mem[$start])/1024);          
        }else{
            return number_format(($_info[$end]-$_info[$start]),$dec);
        }      
    }else{ // 记录时间和内存使用
        $_info[$start]  =  microtime(TRUE);
        if(MEMORY_LIMIT_ON) $_mem[$start]           =  memory_get_usage();
    }
}

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