#How long does it take to learn PHP to develop?
How long does it take to learn PHP the fastest?
Discussing issues without prerequisites will only turn into meaningless quarrels.
Therefore, we first set two prerequisites:
Premise 1. The student base is "without any programming language foundation" and can "be proficient in operating computers (typing keyboards, Create a directory, etc.)".
Premise 2. "Learning PHP" means taking a formal job in PHP.
Under this premise, whether self-study or training, learning PHP is normal The speed is 4 months; the limit speed is: 2 months!
A classmate named "Xing Luo" spent 56 days on self-study in 2013 and got an offer. Now he works in Nanjing.
The study time of "Xingluo" is 16 hours a day.
In the past two years, hundreds of students with varying foundations have graduated from high school/majored in ancient literature/majored in English/lathe workers/security guards/Zhangjiakou The miners... Wait, it took them 2 months to go from Boolean education to working PHP positions.
The fastest student is 49 days, and they study from 12 to 14 days a day Hours.
2 months is so short, how can you learn it?
In fact, you should ask the other way around: Why can’t you learn it in 2 months?
What the Olympic Games pursue is the limit of human physical strength.
When learning programming, why don’t we pursue the limit of mental power?
In sprinting, 100 meters in 10 seconds was once considered impossible for humans by scientists. The limit of transcendence.
But after being broken through by Jim Hines, more and more players have broken through this limit.
So, the real limit is in your heart.
Of course, subjective hard work alone is not enough. Scientific and efficient learning methods are the guarantee for rapid learning.
For more PHP related knowledge, please visit PHP Tutorial!
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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。

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。

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。

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。

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。


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