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When to use static vs instantiated classes
... Framework. There are classes which use static method calls (factories) in order to build objects. It was impossible for me to supply another factory to that instance in order to get a customized object returned. The solution to this problem is to only use instances and instace methods and enforce s...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...搭建高可用MongoDB集群（一）——配置MongoDB》提到了几个问题还没有解决。主节点挂了能否自动切换连接？目前需要手工切换。 在上一篇文章《搭建高可用MongoDB集群（一）——配置MongoDB》 提到了几个问题还没有解决。
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How to read a large file line by line?
...ne before while $file->setFlags(SplFileObject::DROP_NEW_LINE); in order to drop newlines at the end of a line.
– elshnkhll
Nov 9 '15 at 18:22
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PHP: If internet explorer 6, 7, 8 , or 9
...eragent contains safari. so above test should report chrome as safari. the order should be reversed. check keyword chrome first.
– Average Joe
Oct 24 '18 at 9:06
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Why is  appearing in my HTML? [duplicate]
... Includes: If the included files are stored with BOM (e.g. UTF-8 with Byte Order Mark), there will be appearances of  in the file assembled by the webserver. Simple solution: Save the files as UTF-8 without Byte Order Mark.
– The Conspiracy
Apr 15 '...
How to post data in PHP using file_get_contents?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Migration: Cannot add foreign key constraint
...ed as a primary key in it's original table. Migrations get executed in the order they were created as indicated by the file name generated after running migrate:make. E.g. 2014_05_10_165709_create_student_table.php.
The solution was to rename the file with the foreign key to an earlier time than th...
How to write into a file in PHP?
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In order to write to a file in PHP you need to go through the following steps:
Open the file
Write to the file
Close the file
$select = "data what we trying to store in a file";
$file = fopen("/var/www/htdocs/folder/test.txt"...
PHP Session Security
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There are a couple of things to do in order to keep your session secure:
Use SSL when authenticating users or performing sensitive operations.
Regenerate the session id whenever the security level changes (such as logging in). You can even regenerate the sessio...
Installing PDO driver on MySQL Linux server
I was suggested, not long ago, to change my code to use PDO in order to parameterize my queries and safely save HTML in the database.
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