Regarding the misunderstandings of PHP programming, we will clarify them. Some misunderstandings are worth pondering, while some are just baseless. Anyway, let’s take a look at these misconceptions.
1. PHP is an object-oriented language, but it is not based on OOPS
This is a completely incorrect understanding, especially for Java programmers, who think that PHP is not based on OOPS; but they will find many object-oriented features, such as interfaces , methods, abstract objects, etc. To be honest, the initial version of PHP did not have many object-oriented features, but PHP 5 adds many object-oriented technologies. More importantly, you may be curious why Bootstrap code becomes so simple in PHP. This is due to the combination of PHP and OO.
2. PHP cannot implement specific functions
This misunderstanding sounds vague, but many developers believe that PHP cannot implement other functions such as memory access. But the fact is that PHP is an extensible language. You only need to write an extension in C or C++ and integrate it. Or, you don’t need to create one. There are hundreds of extensions available online, and you can use them directly as needed.
3. PHP is not safe
Since you think it is unsafe, why not write safe code for it. I admit that there is a lot of unsafe code in PHP, but as programmers, we should try to write reliable and safe code.
If you compare PHP with .NET, PHP will definitely fail. But if you're a skilled programmer, you don't need security "help." Includes day-to-day security concerns, but if their paths are dynamically generated, then you have to be careful. Of course, it might become safer if you master all the commands.
4. Not suitable for large applications
The reason why a language can be used to build large and complex applications must have a certain degree of reliability and high performance, and the scalable PHP does not meet this requirement. But if the application architecture you design and develop is stable, what's the problem with application performance and scaling?
The fact is that some well-known websites are designed using PHP, such as Facebook, Wikipedia, and Yahoo!, etc., and they all work very well.
5. PHP can only be used for website development
Indeed, it is very common to use PHP for website development. But the command line interface (CLI: Command Line Interface) allows applications to run on non-Web servers.
Although some applications have high CPU requirements, they can still be developed and run in PHP by executing the PHP CLI. What's more, if you want to develop desktop applications using PHP, just use Windows-specific extensions.
6. The development process is slow
I really don’t know where this misunderstanding came from. It's possible that the PHP code you wrote is messy and filled with a lot of MySQL statements (which, although they make sense, really shouldn't be there). In fact, PHP has a large number of frameworks for developers to use. Proper use of them will achieve twice the result with half the effort and greatly reduce development time. So, don't complain about being slow.
7. Professional developers don’t use PHP
Regarding this misunderstanding, there are various opinions in the market, such as PHP is a piece of cake for beginners, it is for those who don’t want to take development seriously, etc. Of course, I have to admit that PHP does not make sense in some aspects, but such misunderstandings are really ridiculous. If there are many web applications here that are developed using PHP, then imagine that developers who have always been rigorous are staying away from PHP, which is completely wrong.
8. Performance issues
This is a technical issue, not a misunderstanding. Everything has good and bad aspects. Performance optimization has always been a topic discussed by developers. In fact, for applications with low performance, they may be filled with a lot of junk code, such as implicit conversions, useless modules, lack of overloading of operation methods, etc., which will affect the performance of PHP applications. But it ultimately depends on how you use the language to create a stable and fast application.
9. Cheap applications mean low quality
In a market environment where open source is gradually becoming mainstream, free and open source are the biggest advantages of PHP. This means that most developers with expertise can provide development services and also save costs for clients. But this does not mean that there is a problem with quality, and high-performance applications can also be developed.
As programming languages continue to develop and grow, various misunderstandings will follow, but no matter what, some false rumors will be dispelled without attack. As the saying goes, practice is the only criterion for testing truth, so before choosing to believe or not, it is best to test and confirm it yourself.

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。

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。

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。

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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SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
