后台管理系统总是成百万的数据导出,使用excel导出根本不能实现,excel只支持65536,2007和2010的是1048576,所以无论哪一种都不能满足需求,csv就符合需求,不限制记录的条数,但是大量数据如果一次性处理导出,会直接导致内存溢出,脚本停止工作,所有采用分割方式导出是比较有好处的。
<?php error_reporting(0); header ( "Content-type:application/vnd.ms-excel" ); header ( "Content-Disposition:filename=" . iconv ( "UTF-8", "GBK", "topic" ) . ".csv" ); //连接数据库 $link = mysql_connect('localhost','root','root') or die('连接错误'); //选择数据库 mysql_select_db("bbs",$link); //设置字符集 mysql_query("set names utf8"); //查询函数 function get_res($sql,$link){ $res = mysql_query($sql,$link); if(!$res){ die("操作失败".mysql_error()); } $arr=array(); while ($row = mysql_fetch_assoc($res)) { $arr[]=$row; } return $arr; } //查询记录总数 function getTotalCount(){ $result = mysql_query("SELECT count(*) as count FROM medsci_edu_public_medsciedu_topic", $link); return $result['count']; } // 打开PHP文件句柄,php://output 表示直接输出到浏览器 $fp = fopen('php://output', 'a'); //表头 $column_name = array('topic_id','cat_id','user_id','is_best','is_top','topic_title','topic_content','topic_img','hits','total_reply_count','created_time','last_updated_time','topic_status','last_reply_name'); // 将中文标题转换编码,否则乱码 foreach ($column_name as $i => $v) { $column_name[$i] = iconv('utf-8', 'gbk', $v); } // 将标题名称通过fputcsv写到文件句柄 fputcsv($fp, $column_name); $pagecount = 10000;//一次读取多少条 $totalcount = getTotalCount();//总记录数 $sql = "select * from medsci_edu_public_medsciedu_topic"; for ($i=0;$i<intval get_res limit foreach as array iconv fputcsv unset ob_flush flush exit>结果测试: <br> <br> <p></p> <p class="sycode"> </p> <p>版权声明:本文为博主原创文章,未经博主允许不得转载。</p> </intval>

PHPisusedforsendingemailsduetoitsintegrationwithservermailservicesandexternalSMTPproviders,automatingnotificationsandmarketingcampaigns.1)SetupyourPHPenvironmentwithawebserverandPHP,ensuringthemailfunctionisenabled.2)UseabasicscriptwithPHP'smailfunct

The best way to send emails is to use the PHPMailer library. 1) Using the mail() function is simple but unreliable, which may cause emails to enter spam or cannot be delivered. 2) PHPMailer provides better control and reliability, and supports HTML mail, attachments and SMTP authentication. 3) Make sure SMTP settings are configured correctly and encryption (such as STARTTLS or SSL/TLS) is used to enhance security. 4) For large amounts of emails, consider using a mail queue system to optimize performance.

CustomheadersandadvancedfeaturesinPHPemailenhancefunctionalityandreliability.1)Customheadersaddmetadatafortrackingandcategorization.2)HTMLemailsallowformattingandinteractivity.3)AttachmentscanbesentusinglibrarieslikePHPMailer.4)SMTPauthenticationimpr

Sending mail using PHP and SMTP can be achieved through the PHPMailer library. 1) Install and configure PHPMailer, 2) Set SMTP server details, 3) Define the email content, 4) Send emails and handle errors. Use this method to ensure the reliability and security of emails.

ThebestapproachforsendingemailsinPHPisusingthePHPMailerlibraryduetoitsreliability,featurerichness,andeaseofuse.PHPMailersupportsSMTP,providesdetailederrorhandling,allowssendingHTMLandplaintextemails,supportsattachments,andenhancessecurity.Foroptimalu

The reason for using Dependency Injection (DI) is that it promotes loose coupling, testability, and maintainability of the code. 1) Use constructor to inject dependencies, 2) Avoid using service locators, 3) Use dependency injection containers to manage dependencies, 4) Improve testability through injecting dependencies, 5) Avoid over-injection dependencies, 6) Consider the impact of DI on performance.

PHPperformancetuningiscrucialbecauseitenhancesspeedandefficiency,whicharevitalforwebapplications.1)CachingwithAPCureducesdatabaseloadandimprovesresponsetimes.2)Optimizingdatabasequeriesbyselectingnecessarycolumnsandusingindexingspeedsupdataretrieval.

ThebestpracticesforsendingemailssecurelyinPHPinclude:1)UsingsecureconfigurationswithSMTPandSTARTTLSencryption,2)Validatingandsanitizinginputstopreventinjectionattacks,3)EncryptingsensitivedatawithinemailsusingOpenSSL,4)Properlyhandlingemailheaderstoa


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver Mac version
Visual web development tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)
