61、增加了create_function(),用于快速建立函数。(Zeev, Zend Engine)
62、增加了数组和数组、对象和对象的比较功能。“==”符号提供无序的比较功能,“===”提供有序的比较。(Zeev, Zend Engine)
63、Allow all functions that receive user-defined function callbacks to accept an array that contains an object and a method name, in place of a function name, e.g. usort($array, array($obj, "ObjSort"))
63、允许所有函数支持用户定义的function callback(不知道怎么翻)用来接受一个包括一个对象和一个方法名的数组。(Zeev, Zend Engine)
64、增加了set_error_handler()函数,允许用户自己编写错误处理函数以替代内建的错误处理功能。(Zeev, Zend Engine)
65、把user_error()改名为trigger_error();但user_error()继续保留有效。(Zeev, Zend Engine)
66、修正了全局/静态的声明为需要在其末尾加上分号“;”。(Andi, Zend Engine)
67、清除了PCRE(这是什么东西?)扩展。(Andrei)
68、给in_array()函数增加了第三个参数。如果此参数为 true ,in_array()将进行严格的比较以替代默认的比较方法。(Andrei)
69、增加了pg_trace()和pg_untrace()函数。(Dominic J. Eidson & Zeev)
70、ignore_user_abort=Off现在是默认值。(Thies)
71、增加了能递归合并相同键值的函数array_merge_recursive()。(Andrei)
72、修正了OCIParse在解析非法SQL语句时崩溃的问题。(Thies)
73、修正了在非永久性连接时,mysql_connect()会忽略socket参数的BUG。(Zeev)
74、在php.ini中增加disable_functions的选项,使管理员能禁用某些可能引起安全问题的函数。(Zeev)
75、修正了WIN32中session的问题。在php.ini里,save_path选项,现在需要用分号“;”代替原来的“:”来限定使用的目录层数。(Andi)
76、在无法找到PHP文件时,APACHE将给出“Declined”的信息。(Rasmus)
77、修正了十进制数字在国际化环境下的问题。数字应为标准的美国格式(为什么??!!)。(Andi, Zend Engine)
78、给函数preg_quote()增加了第二个参数。这个参数允许引用一个通常是常规表达式分隔符的字符。(Andrei)
79、未提交的OCI8的事务将在连接关闭前取消。(Thies)
80、ignore_user_abort()及一些相关函数能在CGI模式下工作正常。(Patch by daniel.braun@ercom.fr)
81、增加了YAZ的扩展(这又是什么东东?)。(dickmeiss).
82、修正了在某些情况下,重新声明类时会引起崩溃的BUG。(Stanislav & Zeev, Zend Engine)
83、修正了min()/max()的错误。(Andrei)
84、增加了用来读取JPEG文件EXIF数据的模块。大部分数码相机会在生成JPEG文件时,把所有的信息嵌在文件里。(Rasmus)
85、修正了在使用basename()时,"file.ext///"不会返回"/path/file.ext///"形式值的BUG。(Rasmus)
86、增加了swf_ortho函数。(Sterling)
87、提供了虚拟当前工作目录(virtual current working directory)的支持。这个功能大大的增加了多线程版本的PHP的功能性和稳定性。(Andi, Sascha)

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

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

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.

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

PHPisusedforsendingemailsduetoitsbuilt-inmail()functionandsupportivelibrarieslikePHPMailerandSwiftMailer.1)Usethemail()functionforbasicemails,butithaslimitations.2)EmployPHPMailerforadvancedfeatureslikeHTMLemailsandattachments.3)Improvedeliverability

PHP performance bottlenecks can be solved through the following steps: 1) Use Xdebug or Blackfire for performance analysis to find out the problem; 2) Optimize database queries and use caches, such as APCu; 3) Use efficient functions such as array_filter to optimize array operations; 4) Configure OPcache for bytecode cache; 5) Optimize the front-end, such as reducing HTTP requests and optimizing pictures; 6) Continuously monitor and optimize performance. Through these methods, the performance of PHP applications can be significantly improved.

DependencyInjection(DI)inPHPisadesignpatternthatmanagesandreducesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itallowspassingdependencieslikedatabaseconnectionstoclassesasparameters,facilitatingeasiertestingandscalability.

CachingimprovesPHPperformancebystoringresultsofcomputationsorqueriesforquickretrieval,reducingserverloadandenhancingresponsetimes.Effectivestrategiesinclude:1)Opcodecaching,whichstorescompiledPHPscriptsinmemorytoskipcompilation;2)DatacachingusingMemc


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