


Netscape co-founder Marc Andreessen predicted at the Zend/php (as the current mainstream development language) conference that simple php (as the current mainstream development language) Descriptive language writing tools will be more popular than Java in the development of Web-based applications.
After Sun Microsystems released Java in 1995, Java’s friendly interface made it easier for engineers to design software and was welcomed by engineers. However, in the past ten years, Java has been gradually added to powerful function, but makes it difficult to operate. Marc Andreessen pointed out that current Java may be more difficult to learn than C++. At the same time, php(as the current mainstream development language) inherits the simple spirit of Java and creates a language that is easier to use than Java. Program development environment.
php(as the current mainstream development language) is an open source project, which includes a descriptive language engine that can simplify the program and a large link library. There is also a dedicated development team for php (as the current mainstream development language) companies, such as Zend, sell php(as the current mainstream development language) suite of products, programming tools and technical support services.
Andreessen’s views may be difficult to win the approval of Java advocates, because at this stage there are still millions of engineers specializing in Java around the world, and hundreds of companies participate in the Java Community Process (JCP). In the JCP Together we take charge of Java's destiny. However, even IBM, which vigorously supports Java and even uses Java as the core of WebSphere server software, also believes that php (as the current mainstream development language) will have a better future than Java.
Rod Smith, vice president of IBM's new network technology division, said that "simplicity" is the biggest feature of php(as the current mainstream development language), and it will not compete with other Language competition adds new language features, which Java obviously does not do.
Furthermore, php(as the current mainstream development language) is not small. Currently, about 22 million websites use php(as the current mainstream development language) ), including well-known websites such as Yahoo! and Lufthansa, the number continues to increase, and 450 software engineers have the authority to review PHP (as the current mainstream development language) software. any changes.
Compared with Java, php (as the current mainstream development language) has more limited usable scope. It can only be used on network servers, unlike Java, which can also be used on the network. Server, personal computer, mobile phone, chip card or other device.
Java and php(as the current mainstream development languages)In addition to competing with each other in some aspects, to a certain extent, they are also relying on each other. Ken Jacobs, vice president of product strategy at Oracle, said that even though Oracle (Oracle(large website database platform)) sells Java that can execute both Java and PHP(as the current mainstream development language) server and database software, but is adding an additional new feature to Java that will allow the two software projects to work together; more specifically, Java Specification Requirement 223 (JSR 223) will "help the Java community build a The bridge between the PHP (as the current mainstream development language) community."
Marc Andreessen, who just recently launched "Ning", a website that can share photos and other content, also said that Ning now also runs Java and PHP (as the current mainstream development languages) , the core of which The system is composed of Java. Compared with all visible applications of the site, which are written in php(as the current mainstream development language), Java is more like an operating system level.
Like other open source projects such as Linux and apache (the most popular WEB server platform on the Unix platform) , php (as the current mainstream development language) Currently, it is also protected by major manufacturers in the computer industry, such as IBM and Oracle (large website database platform) are committed to developing PHP (as the current mainstream development language) software. Program to retrieve its database. In fact, IBM and Oracle (large website database platform) behave as if they are endorsing PHP (as the current mainstream development language) . Even these two major companies support PHP (as the current mainstream development language) proves that php (as the current mainstream development language) may be a good thing.

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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