I just learned PHP, and garbled characters often appear when writing projects. So how to solve the garbled code in php? The following article will introduce to you the solution to garbled characters in PHP. I hope it will be helpful to you.
1. Chinese garbled code problem in PHP page (the data is static)
If your PHP page has garbled Chinese characters, To solve the problem, the encoding of PHP itself needs to match the encoding of the HTML web page.
Just add the following code at the beginning of the page.
<?php header("content-type:text/html;charset=utf-8"); //设置编码 ?>
2. PHP Mysql Chinese garbled problem (data is dynamic)
In addition to following the second one In addition to operations, you must also add database coding before querying/modifying/adding your data. Moreover, it is worth noting that the UTF8 here is different from the previous one, there is no horizontal line in the middle.
<?php mysql_query('SET NAMES UTF8'); //接下来的就是查出数据或者修改,增加 ?>
If you are using MySQL version 4.1 or higher, you can set a character encoding after the link database operation, like the following
UTF-8 encoding is just one of the encodings. If you don’t want to use UTF-8 encoding, you can also use other encodings. Just replace UTF-8 with the encoding you want to use. Currently, GB2312 is mainly used in Chinese website development. and UTF-8 two encodings.
Note:
The mysql_query("set names 'coding'"); encoding added before the PHP program that needs to perform database operations must be consistent with the PHP encoding. , if the PHP encoding is gb2312, then the mysql encoding is gb2312, if it is utf-8, then the mysql encoding is utf8, so that there will be no garbled characters when inserting or retrieving data.
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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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