php certificates include: 1. PHP Basic Certificate, a certificate that evaluates an individual’s understanding and mastery of basic knowledge of the PHP language; 2. PHP Advanced Certificate, a certificate that measures an individual’s understanding of advanced PHP topics and technologies ; 3. Zend PHP Certificate, a certificate that comprehensively evaluates an individual’s knowledge and skills in using PHP for development; 4. OCP PHP Certificate, a certificate that evaluates an individual’s ability to use PHP for enterprise-level application development; 5. PCE PHP certificate, etc.
The operating environment of this tutorial: Windows 10 system, PHP8.1.3 version, Dell G3 computer.
PHP is a scripting language widely used for developing websites and web applications. For those who wish to pursue a career in the field of PHP development, holding relevant PHP certificates is an effective way to enhance their competitiveness. This article will introduce some common PHP certificates and their related information.
1. PHP Basic Certification
The PHP Basic Certificate is a basic certification for PHP programming beginners. This certificate is designed to assess an individual's understanding and mastery of the basics of the PHP language. This certificate is suitable for those who have a basic understanding of PHP and want to further develop their skills in this field. Obtaining this certificate through the exam will verify an individual's mastery of PHP's basic syntax, variables, operators, flow control statements, etc.
2. PHP Advanced Certification
The PHP Advanced Certificate is a certificate that measures an individual’s understanding of advanced PHP topics and technologies. This certificate is suitable for developers who are already familiar with the basics of PHP and want to further expand their skills and knowledge. Obtaining this certificate through the exam will verify an individual's mastery of PHP object-oriented programming, database processing, Web services, security, etc.
3. Zend PHP Certificate (Zend PHP Certification)
The Zend PHP certificate is one of the PHP certification certificates widely recognized in the industry. Zend is a leading PHP technology company who developed the Zend Engine, the core part of the PHP interpreter. The Zend PHP Certificate is a comprehensive assessment of an individual's knowledge and skills in the development process using PHP. Obtaining this certificate through the exam will verify an individual's PHP development capabilities, optimization capabilities and security knowledge.
4. OCP PHP Certificate (Oracle Certified Professional PHP Certification)
OCP PHP certificate is a PHP certification certificate provided by Oracle. This certificate is designed to evaluate an individual's competency in enterprise-level application development using PHP. Obtaining this certificate through the exam will verify an individual's mastery of PHP database connections, performance optimization, code security, etc.
5. PCE PHP Certificate (Professional PHP Developer Certification)
PCE PHP Certificate is a PHP professional certification certificate provided by PHP Institute. This certificate is designed to verify an individual's professionalism in the field of PHP development. Passing the exam will validate an individual's skills in PHP frameworks, server-side development, web services, and security.
To sum up, there are many different certificates in the PHP field, covering different levels from basic knowledge to advanced skills. Whether you are a beginner or an experienced developer, holding a relevant PHP certificate will help improve your competitiveness and career advancement. No matter which PHP certificate you choose, preparing for and taking the relevant exams will be an important step in your progress and success in the field of PHP development.
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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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