


PHP7.0 installation notes organized, php7.0 notes organized
On June 11, 2015, the PHP official website announced the official public release of the alpha version of the first version of PHP7.
PHP7 features:
PHP 7.0.0 Alpha 1 uses the new version of ZendEngine engine and brings many new features. The following is an incomplete list:
(1) Performance improvement: PHP7 has twice the performance improvement as PHP5.6. Improved performance: PHP 7 is up to twice as fast as PHP 5.6
(2) Comprehensive and consistent 64-bit support. Consistent 64-bit support
(3) Many previous fatal errors are now changed to throwing exceptions. Many fatal errors are now Exceptions
(4) Removed some old SAPI (Server Side Application Programming Port) and extensions that are no longer supported. Removal of old and unsupported SAPIs and extensions
(5) Added null join operator. The null coalescing operator (??)
(6) Newly added combined comparison operators. Combined comparison Operator ()
(7) Added function return type declaration. Return Type Declarations
(8) Newly added scalar type declaration. Scalar Type Declarations
(9) Added new anonymous class. Anonymous Classes
Collection of php7 installation notes
# Install mcrypt
yum install -y php-mcrypt libmcrypt libmcrypt-devel
# Upgrade bison
cd /var/soft/ wget http://ftp.gnu.org/gnu/bison/bison-2.6.4.tar.gz tar -xvzf bison-2.6.4.tar.gz cd bison-2.6.4 ./configure make && make install
# Upgrade re2c to solve the problem You will need re2c 0.13.4 or later if you want to regenerate PHP
parsers.Error
cd /var/soft/ wget http://sourceforge.net/projects/re2c/files/re2c/0.13.5/re2c-0.13.5.tar.gz/download tar zxf re2c-0.13.5.tar.gz && cd re2c-0.13.5 ./configure make && make install
Compile PHP7
# 创建目录 mkdir -p /var/soft/php7 cd /var/soft/php7 # 下载源代码 git clone http://git.php.net/repository/php-src.git cd php-src ./buildconf # 配置参数 ./configure --prefix=/usr/local/php7 \ --with-config-file-path=/usr/local/php7/etc \ --with-mcrypt=/usr/include \ --with-mysql=mysqlnd \ --with-mysqli=mysqlnd \ --with-pdo-mysql=mysqlnd \ --with-gd \ --with-iconv \ --with-zlib \ --enable-xml \ --enable-bcmath \ --enable-shmop \ --enable-sysvsem \ --enable-inline-optimization \ --enable-mbregex \ --enable-fpm \ --enable-mbstring \ --enable-ftp \ --enable-gd-native-ttf \ --with-openssl \ --enable-pcntl \ --enable-sockets \ --with-xmlrpc \ --enable-zip \ --enable-soap \ --without-pear \ --with-gettext \ --enable-session \ --with-curl \ --with-jpeg-dir \ --with-freetype-dir \ --enable-opcache ################################################################################# # 编译安装php时出现 /encodings.c:101: undefined reference to `libiconv_close' 错误的解决方法 # 在装php时出现以下的错误: # /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:73: undefined reference to `libiconv_open' # /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:81: undefined reference to `libiconv' # /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:101: undefined reference to `libiconv_close' # /root/Downloads/php-5.6.5/ext/xmlrpc/libxmlrpc/encodings.c:101: undefined reference to `libiconv_close' # collect2: error: ld returned 1 exit status # make: *** [sapi/cli/php] Error 1 # 根据php官网描述这是一个bug(https://bugs.php.net/bug.php?id=52611)。在configure以后要手动修改下Makefile文件,找到EXTRA_LIBS 在最后添加 -liconv 即可顺利通过 # (大约在Makefile文件的104) # EXTRA_LIBS = -lcrypt -lz -lresolv -lcrypt -lrt -lmysqlclient -lmcrypt -lltdl -lpng -lz -ljpeg -lcurl -lz -lrt -lm -ldl -lnsl -lxml2 -lz -lm -ldl -lssl -lcrypto -lcurl -lxml2 -lz -lm -ldl -lfreetype -lmysqlclient -lz -lm -lssl -lcrypto -ldl -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lcrypt -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lxml2 -lz -lm -ldl -lssl -lcrypto -lcrypt -liconv ################################################################################# # 编译安装 make && sudo make install
# Configuration
cp php.ini-production /usr/local/php7/etc/php.ini cp sapi/fpm/init.d.php-fpm /etc/init.d/php7-fpm chmod +x /etc/init.d/php7-fpm cp /usr/local/php7/etc/php-fpm.conf.default /usr/local/php7/etc/php-fpm.conf cp /usr/local/php7/etc/php-fpm.d/www.conf.default /usr/local/php7/etc/php-fpm.d/www.conf
# Configure opcache
vim /usr/local/php7/etc/php.ini # 加入 zend_extension=/usr/local/php7/lib/php/extensions/no-debug-non-zts-20141001/opcache.so # 启动 /etc/init.d/php7-fpm start
# View PHP version
/usr/local/php7/bin/php -v
Result:
PHP 7.0.0-dev (cli) (built: Mar 3 2015 10:02:26) Copyright (c) 1997-2015 The PHP Group Zend Engine v3.0.0-dev, Copyright (c) 1998-2015 Zend Technologies with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2015, by Zend Technologies
The above is the PHP7.0 installation notes shared with you in this article. I hope it will be helpful to you.

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。


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