PHP method to get the class name and all function names: 1. [get_class(class name)] gets the class name of the class where the current statement is located; 2. [get_class_methods(class name)] gets all the class name method name and form an array.
PHP method to get the class name and all function names:
1. Get the line number, File path file name, class name, method name constants
__LINE__
: The current line number in the file.
__FILE__
: The full path and file name of the file.
If used in an include file, returns the include file name. As of PHP 4.0.2, __FILE__ always contains an absolute path, while versions before that sometimes contained a relative path.
__FUNCTION__
: Function name (newly added in PHP 4.3.0).
Since PHP 5, this constant returns the name of the function when it was defined (case-sensitive). In PHP 4 this value is always lowercase.
__CLASS__
: The name of the class (newly added in PHP 4.3.0).
Since PHP 5, this constant returns the name of the class when it was defined (case-sensitive). In PHP 4 this value is always lowercase.
__METHOD__
: The method name of the class (newly added in PHP 5.0.0). Returns the name of the method as it was defined (case-sensitive).
Note: These constants are preceded and followed by two underscores.
2. How to get class name, method name, variable name
I found that one of the powerful things about PHP is that there are often unexpected functions or these constants to help you Complete certain functions conveniently. I understand more and more why there are so many questions testing specific PHP functions in the PHP competition questions.
Find some other constants or functions in one breath and continued to add them.
get_class(class name); //Get the class name of the class where the current statement is located
get_class_methods(class name); //Get the class All the method names of the name class and form an array
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get_class_vars(class name); //Get all the highlighted names of the class name class and form an array
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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。

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。

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。

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。


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