[英]php extract root directory from set of files
我有一个文件列表:
C:/PATH/PATH2/file1.txt
C:/PATH/PATH2/file2.txt
C:/PATH/PATH2/file3.txt
C:/PATH/PATH2/fs/file4.txt
C:/PATH/PATH2/fs/xfile5.txt
C:/PATH/PATH2/x/file6.txt
很明显,“ C:/ PATH / PATH2 /”是它们的根。 如何以最少的痛苦找到并删除它?
<?php
$files = array(
'C:/PATH/PATH2/file1.txt',
'C:/PATH/PATH2/file2.txt',
'C:/PATH/PATH2/file3.txt',
'C:/PATH/PATH2/fs/file4.txt',
'C:/PATH/PATH2/fs/xfile5.txt',
'C:/PATH/PATH2/x/file6.txt',
);
foreach ($files as $file) {
// use the first file as the base
if (!isset($base)) {
$base = $file;
continue;
}
// use the shortest of the base and the current file as the loop limit
$length = strlen($base) < strlen($file) ? strlen($base) : strlen($file);
// compare each character of the two starting from the beginning
for($i = 0;$i<$length;$i++) {
// stop when characters don't match
if ($base[$i] !== $file[$i]) {
break;
}
}
// set the base to the matching characters
$base = substr($base, 0, $i);
}
// strip the last slash and any file/subdir characters that happened to also match
$base = substr($base, 0, strrpos($base, '/'));
echo 'base ', $base, PHP_EOL;
如果只想从字符串中删除C:/ PATH / PATH2,请使用:str_replace
在此处查看有关此内容的更多信息: http : //php.net/manual/en/function.str-replace.php
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