search
HomeBackend DevelopmentPHP Tutorial循环大量数据导致内存超出,不增加内存如何解决该问题

我在生成HTML文件时,由于数据量较大,无数次的 fopen fwrite fclose,文件还没生成完呢,就提示内存超出。  
我的HTML生成方式是,读入缓存,再写入文件  

ob_start ();		
$temp = ob_get_contents ();		
ob_end_clean ();

 
我unset(temp) 也不起作用,这个问题到底该怎么解决。不知那些CMS又是怎么生成HTML的,再大的数据也不会内存超出

回复讨论(解决方案)

不知道你的具体代码,不好说什么  
 
需要及时释放工作变量,可将工作放在函数中执行,以利用 php 自己的回收机制  
自己释放变量时需注意的是数组占用的内存是只增不减的,所以要注意数组的复用


我在生成HTML文件时,由于数据量较大,无数次的 fopen fwrite fclose,文件还没生成完呢,就提示内存超出。  
我的HTML生成方式是,读入缓存,再写入文件  

ob_start ();		
$temp = ob_get_contents ();		
ob_end_clean ();

 
我unset(temp) 也不起作用,这个问题到底该怎么解决。不知那些CMS又是怎么生成HTML的,再大的数据也不会内存超出


比如某个脚本为必须为死循环,那么循环到一定次数就会造成内存超出,如何控制每循环100次,释放内存

那你加个循环控制量就是了

PHP生成HTML,怎样才能让他内存不超出,求代码

周末休息没人回答了




我在生成HTML文件时,由于数据量较大,无数次的 fopen fwrite fclose,文件还没生成完呢,就提示内存超出。    
我的HTML生成方式是,读入缓存,再写入文件    

ob_start();		
$temp = ob_get_contents ();		
ob_end_clean ();

   
我unset(temp) 也不起作用,这个问题到底该怎么解决。不知那些CMS又是怎么生成HTML的,再大的数据也不会内存超出


比如某个脚本为必须为死循环,那么循环到一定次数就会造成内存超出,如何控制每循环100次,释放内存
 
 

$p = $_GET['p'] * 100;
for($i=$p; $i<$p+100; $i++){	e
cho $i;	echo &#39;<br>&#39;;	
// .....	
// 执行其他操作
}sleep(1);
?>
<script>
var p = GetQueryString(&#39;p&#39;);
p++;var url = window.location.href;
var new_url = url.replace(/\?p=(\d)+/, &#39;&#39;) + &#39;?p=&#39; + p;
window.location.href = new_url;
function GetQueryString(name){     
var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");     
var r = window.location.search.substr(1).match(reg);     
if(r!=null)return  unescape(r[2]); return null;}
</script>

思路就是把大任务分批执行

用分页读取的方式。  
加:register_shutdown_function  
每页写完,自动header location到下一页。  
 
用register_shutdown_function 的话,只要你打开了第一次,就可以关闭浏览器了,它会自动执行。  
 
数据的最后一页写完了,要执行:die();

这种情况要分批执行,上个代码,你马上就明白其中的原理了  

$total = 10;$s = 0;
if (isset ( $_GET [&#39;s&#39;] )) {        
$s = &$_GET [&#39;s&#39;];
}$per = $s + 5; 
// 每次循环5条if ($per > $total) {
 // 如果下次循环会超过总数,就让他只能循环到总数        
 $per = &$total;}while ( $s < $per ) {        
 echo ++ $s;        echo &#39;<br>&#39;;
 }
 echo &#39;<hr>&#39;;
 echo $s;if ($s < $total) {        
 echo "<script>window.location.href=&#39;?s=$s&#39;</script>";
 }
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
PHP Dependency Injection Container: A Quick StartPHP Dependency Injection Container: A Quick StartMay 13, 2025 am 12:11 AM

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Dependency Injection vs. Service Locator in PHPDependency Injection vs. Service Locator in PHPMay 13, 2025 am 12:10 AM

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHP performance optimization strategies.PHP performance optimization strategies.May 13, 2025 am 12:06 AM

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHP Email Validation: Ensuring Emails Are Sent CorrectlyPHP Email Validation: Ensuring Emails Are Sent CorrectlyMay 13, 2025 am 12:06 AM

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl

How to make PHP applications fasterHow to make PHP applications fasterMay 12, 2025 am 12:12 AM

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

PHP Performance Optimization Checklist: Improve Speed NowPHP Performance Optimization Checklist: Improve Speed NowMay 12, 2025 am 12:07 AM

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

PHP Dependency Injection: Improve Code TestabilityPHP Dependency Injection: Improve Code TestabilityMay 12, 2025 am 12:03 AM

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

PHP Performance Optimization: Database Query OptimizationPHP Performance Optimization: Database Query OptimizationMay 12, 2025 am 12:02 AM

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment