php面试中关于面向对象的相关主题素材_php实例

作者:云顶集团线路检测

1.改换php.ini,在终极填写如下代码:

convert_uuencode() 函数使用 uuencode 算法对字符串实行编码。

[root@192 sbin]# ll /usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/总用量 3984-rwxr-xr-x. 1 root root 382568 10月 22 17:57 bcmath.so
"; } } $p=new des(); /* 实例化类 */ echo "程序开始
"; unset; /* 销毁变量$p */ echo "程序结束";?>
bool isset
[root@www sbin]# php -vPHP 5.6.23  (built: Dec 7 2018 09:00:11) Copyright  1997-2016 The PHP GroupZend Engine v2.6.0, Copyright  1998-2016 Zend Technologies

实例

上述正是那篇小说的全体内容了,希望本文的内容对大家的就学或许办事具有自然的参照学习价值,多谢大家对台本之家的支撑。如若你想打听越来越多相关内容请查看上边相关链接

暗许的拜谒权限为public,也正是说,假如多少个方法未有被public、protected或private修饰,那么它暗中同意的作用域为public。

参数:此函数选择多少个参数。那一个函数的第多少个参数是$ var。此参数用于存储变量的值。

[root@www php]# tail php.ini[opcache]zend_extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/opcache.so;extension=opcache.soopcache.memory_consumption=32opcache.interned_strings_buffer=8opcache.max_accelerated_files=1000opcache.revalidate_freq=60opcache.fast_shutdown=1opcache.enable_cli=1
convert_uuencode

2.实行phpize命令,phpize命令在PHP安装目录的bin目录下,如/usr/local/php/bin/phpize。

1卡塔 尔(英语:State of Qatar)出发点分裂。面向对象是用切合健康思维方法来拍卖客观世界的难题,重申把难点域的中央思想直接照射到对象及对象时期的接口上。而面向进度方法规不然,它重申的是经过的抽象化与模块化,它是以进度为主导组织或管理客观世界难点的。

"); } // 声明一个空数组 $array = array(); echo isset ? 'array is set.' : 'array is not set.'; ?>

0 is set with isset functionarray is not set.

2.检查结果

实例 1

[root@192 bcmath]# /usr/local/php/bin/phpizeConfiguring for:PHP Api Version: 20131106Zend Module Api No: 20131226Zend Extension Api No: 220131226

二、面向对象有何样特色?

自己斟酌五个函数的因由:

重启php-fpm之后,在info.php页面也能见到相关景况。

讲授: 该函数把富有字符串编码为可打字与印刷的字符,确认保证其数据仓库储存款和储蓄及网络传输的乌海。请记住,在重新接受数据前,请使用 convert_uudecode() 函数。

1.进去PHP源码包目录下的ext/bcmath目录。

三、什么是构造函数和析构函数?

empty()函数是生龙活虎种语言构造,用于分明给定变量是空照旧NULL。!empty函数的否认或补充。empty函数十一分,而!empty函数。

[root@www php]# php -vPHP 5.6.23  (built: Dec 7 2018 09:00:11) Copyright  1997-2016 The PHP GroupZend Engine v2.6.0, Copyright  1998-2016 Zend Technologies with Zend OPcache v7.0.6-dev, Copyright  1999-2016, by Zend Technologies
"; // Decode the string $decodeString = convert_uudecode; echo $decodeString; ?>

7.重启php服务就能够。

面向对象的注重特色有抽象、世袭、封装和多态。

isset函数相同,两个都将赶回雷同的结果。但唯意气风发的界别是!当变量不设一时,empty()函数不会转移任何警报或电子通知。它能够使用其余几个效果与利益。通过将八个职能合併到程序中会招致时间流逝和不必要的内部存款和储蓄器使用。

总结

语法

[root@192 bcmath]# ./configure --with-php-config=/usr/local/php/bin/php-configchecking for grep that handles long lines and -e... /usr/bin/grepchecking for egrep... /usr/bin/grep -Echecking for a sed that does not truncate output... /usr/bin/sedchecking for cc... ccchecking whether the C compiler works... yeschecking for C compiler default output file name... a.outchecking for suffix of executables... checking whether we are cross compiling... nochecking for suffix of object files... ochecking whether we are using the GNU C compiler... yeschecking whether cc accepts -g... yeschecking for cc option to accept ISO C89... none neededchecking how to run the C preprocessor... cc -Echecking for icc... nochecking for suncc... nochecking whether cc understands -c and -o together... yeschecking for system library directory... libchecking if compiler supports -R... nochecking if compiler supports -Wl,-rpath,... yeschecking build system type... x86_64-unknown-linux-gnuchecking host system type... x86_64-unknown-linux-gnuchecking target system type... x86_64-unknown-linux-gnuchecking for PHP prefix... /usr/local/phpchecking for PHP includes... -I/usr/local/php/include/php -I/usr/local/php/include/php/main -I/usr/local/php/include/php/TSRM -I/usr/local/php/include/php/Zend -I/usr/local/php/include/php/ext -I/usr/local/php/include/php/ext/date/libchecking for PHP extension directory... /usr/local/php/lib/php/extensions/no-debug-non-zts-20131226checking for PHP installed headers prefix... /usr/local/php/include/phpchecking if debug is enabled... nochecking if zts is enabled... nochecking for re2c... noconfigure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.checking for gawk... gawkchecking whether to enable bc style precision math functions... yes, sharedchecking for ld used by cc... /usr/bin/ldchecking if the linker  is GNU ld... yeschecking for /usr/bin/ld option to reload object files... -rchecking for BSD-compatible nm... /usr/bin/nm -Bchecking whether ln -s works... yeschecking how to recognize dependent libraries... pass_allchecking for ANSI C header files... yeschecking for sys/types.h... yeschecking for sys/stat.h... yeschecking for stdlib.h... yeschecking for string.h... yeschecking for memory.h... yeschecking for strings.h... yeschecking for inttypes.h... yeschecking for stdint.h... yeschecking for unistd.h... yeschecking dlfcn.h usability... yeschecking dlfcn.h presence... yeschecking for dlfcn.h... yeschecking the maximum length of command line arguments... 1572864checking command to parse /usr/bin/nm -B output from cc object... okchecking for objdir... .libschecking for ar... archecking for ranlib... ranlibchecking for strip... stripchecking if cc supports -fno-rtti -fno-exceptions... nochecking for cc option to produce PIC... -fPICchecking if cc PIC flag -fPIC works... yeschecking if cc static flag -static works... nochecking if cc supports -c -o file.o... yeschecking whether the cc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yeschecking whether -lc should be explicitly linked in... nochecking dynamic linker characteristics... GNU/Linux ld.sochecking how to hardcode library paths into programs... immediatechecking whether stripping libraries is possible... yeschecking if libtool supports shared libraries... yeschecking whether to build shared libraries... yeschecking whether to build static libraries... nocreating libtoolappending configuration tag "CXX" to libtoolconfigure: creating ./config.statusconfig.status: creating config.h

3卡塔 尔(阿拉伯语:قطر‎封装。封装是指将客观事物抽象成类,各个类对笔者的数据和章程实施保养。类可以把团结的数量和措施只让可靠的类依旧目的操作,对不可信的音讯进行隐讳。

上述正是此番介绍的万事知识点,谢谢大家对台本之家的帮忙。

php原版本意况:

php面试中关于面向对象的相关主题素材_php实例_脚本之家,PHP安装逼CMath扩张的方法_php技术_脚本之家云顶娱乐送6元救济官网金:。PHP convert_uuencode() 函数

总结

当对象不再被援引时,将调用析构函数。假若要明显地销毁二个目标,那么能够给指向对象的变量不分红任何值,日常将变量赋值为NULL或许用unset()函数。示例代码如下:

0 is set with isset function1 is set with !empty function

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