1. Cross-compile libxml2 and zlib, and extend the lib library of arm-linux-gcc. Among them, libxml2 is a library file necessary for PHP5 installation.
1.1 Install libxml2.
Unzip libxml2-2.7.8.tar.gz to the home directory.
tar zxvf libxml2-2.7.8.tar.gz -C /home
cd /home/libxml2-2.7.8
CC=arm-linux-gcc ./configure --host=arm-linux --prefix=/usr/local/libxml2 make make installSince then, libxml2 has been installed in the /usr.local/libxml2 directory.
1.2 Install zlib
Unzip zlib-1.2.5.1.tar.gz to the home directory.
tar zxvf zlib-1.2.5.1.tar.gz -C /home cd /home/zlib-1.2.5.1 CC=arm-linux ./configure --prefix=/usr/local/zlib make make installSince then, zlib has been installed in the /usr/local/zlib directory.
2. Cross-compile PHP
Unzip php-5.5.30.tar.gz to the home directory.
tar zxvf php-5.5.30.tar.gz -C /home cd /home/php-5.5.30 CC=arm-linux ./configure --host=arm-linux --prefix=/usr/local/php --disable-all --enable-sockets --with-libxml-dir=/usr/local/libxml2 --with-zlib-dir=/usr/local/zlib make make installSince then, php has been installed in the /usr/loal/php directory.
I can see that the total number of php and php-cgi in the php/bin directory is more than 20M. Because arm resources are tight, we need to streamline PHP and remove debugging information. Execute the following commands in php/bin/:
arm-linux-strip php arm-linux-strip php-cgiAfter executing the above two commands, take a look at the file size of php and php-cgi. The file size is only a few M.
3. Copy the compiled PHP to the target board
cd /usr/local tar zcvf php.tar.gz php/*copies php.tar.gz to the /usr/local directory on the target board through NFS.
cd /usr/local tar zxvf php.tar.gzFinally, php was successfully transplanted to the target board. At this point, you can delete the php.tar.gz of the target board.
4. Description
After decompressing php-5.5.30.tar.gz on the host machine, there will be two files: php.ini-development and php.ini-production. This is called the php.ini configuration file. We need to copy php.ini-development to the /usr/local/php/libs directory on the target board. And change the file name to php.ini. This article does not describe the configuration of the php.ini file. You can search online for relevant configurations. Normally the default is fine.
The above introduces the porting of PHP5530 on ARM, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.

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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