php rmdir forced deletion method: first determine whether the directory exists; then open the directory and return the directory resources, and determine whether it is successful; then traverse the directory and read out the files or folders in the directory; finally use "rmdir( $directory);" method to delete empty directories.
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php rmdir uses recursive function to delete non-empty directories
We all know that the php rmdir() function is used to delete empty directories, but if we want to delete a non-empty directory, we must delete the files or subdirectories in the non-empty directory. This article will tell you This article introduces how to use recursive functions in PHP to delete non-empty directories. Friends in need can refer to it.
First of all, let me introduce to you the rmdir() function.
php rmdir() function
rmdir - delete empty directory
Syntax:
bool rmdir ( string $dirname [, resource $context ] )
Try to delete the directory specified by dirname. The directory must be empty and must have appropriate permissions. An E_WARNING level error will be generated on failure.
Parameters:
dirname: The path to the directory.
context: Added support for context in PHP 5.0.0.
php rmdir() deletes a non-empty directory
As mentioned above, the rmdir() function can only delete empty directories. If it is a non-empty directory, you need to enter it first In the directory, use the unlink() function to delete every file in the directory, and then come back and delete the empty directory. If there are subdirectories in the directory and the directory is not empty, you need to use the recursive method. The source code of the custom recursive function to delete a directory is as follows:
<?php /* by http://www.manongjc.com/article/27.html*/ function delDir($directory){//自定义函数递归的函数整个目录 if(file_exists($directory)){//判断目录是否存在,如果不存在rmdir()函数会出错 if($dir_handle=@opendir($directory)){//打开目录返回目录资源,并判断是否成功 while($filename=readdir($dir_handle)){//遍历目录,读出目录中的文件或文件夹 if($filename!='.' && $filename!='..'){//一定要排除两个特殊的目录 $subFile=$directory."/".$filename;//将目录下的文件与当前目录相连 if(is_dir($subFile)){//如果是目录条件则成了 delDir($subFile);//递归调用自己删除子目录 } if(is_file($subFile)){//如果是文件条件则成立 unlink($subFile);//直接删除这个文件 } } } closedir($dir_handle);//关闭目录资源 rmdir($directory);//删除空目录 } } } delDir("mydir");//调用delDir函数 ?>
In addition to processing recursive deletion of non-empty directories, we can also use the operating system command "rm -rf" to delete non-empty directories, but we must also consider security and Consider cross-platform considerations and try not to use it.
The above is the detailed content of How to force delete php rmdir. For more information, please follow other related articles on the PHP Chinese website!

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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