Who is the best PHP programmer?
Laruence Wind and Snow Corner
www.laruence.com
The only Chinese member of the global PHP development team, php PECL developer. Yaf, Taint and other Pecl extension authors.
Recommendation: "PHP Tutorial"
Related introduction:
In a narrow sense, PHP programmers use PHP for development Language programmers. But often a programmer is not just limited to a certain development language, or divided by a certain development language. However, in order to improve development efficiency, the division of labor among technology companies is becoming increasingly clear, and it is rare for a programmer to develop in multiple languages at the same time.
SKILL REQUIREMENTS
As a qualified PHPer, the first thing is the love for PHP. As the saying goes: "To do something well, you must first understand it and then love it." PHP It is a wonderful development language. You no longer need to hesitate about defining the type of a variable, PHP will automatically determine it; you do not need to declare N many functions when getting a form data, everything is left to PHP!
1. MYSQL
Yes, if we only have a good development language but do not understand the database, we will still be unable to make progress! Fortunately, we have the same open source, compact MYSQL! You know, for a web developer, we can't just know (fill/delete/modify/check-insert/delete/update/select), in order to make our website run faster and smoother, we also need to know mysql Optimization. That's right! At this time, views and indexes will help you achieve the results you want.
2. Apache
How can our program run without Apache! At least you need to know some basic configuration information of Apache!
3. Javascript
"Back-end languages compete with each other, and front-end languages are the only ones that dominate!" Yes, this is a true reflection of Javascript's status as a front-end language! If your website wants to have gorgeous visual effects, you can't do without Javascript; if your website wants to have a good customer experience, you can't do without Ajax! Even though sometimes Javascript frameworks such as YUI and JQuery can help us improve efficiency, don't forget that their foundation is Javascript!
4. Algorithm
In fact, according to common sense, algorithms are the "soul" of programmers. A qualified programmer's first requirement is often a strong foundation in algorithms. However, web development has overturned this tradition. Since PHP is primarily used for web development, this skill is less needed. So, many times, people are discussing whether web developers cannot be counted as real programmers?
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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。

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。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

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。

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。

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。


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