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$file = '/www/htdocs/inc/lib.inc.php';

$filename = basename($file);

echo $filename, 'br/>';// lib.inc.php

$filename = str_replace(strrchr($filename, '.'), '', $filename);

echo $filename, 'br/>';// lib.inc

$file = '/www/htdocs/inc/lib.inc.php';

$path_parts = pathinfo($file);

echo '目录名称' . $path_parts['dirname'], 'br/>'; // /www/htdocs/inc

echo '文件全名' . $path_parts['basename'], 'br/>'; // lib.inc.php

echo '文件后缀' . $path_parts['extension'], 'br/>';// php

echo '文件名称' . $path_parts['filename'], 'br/>'; // lib.inc  // PHP >= 5.2.0

echo '目录名称' . pathinfo($file, PATHINFO_DIRNAME), 'br/>'; // /www/htdocs/inc

echo '文件全名' . pathinfo($file, PATHINFO_BASENAME), 'br/>'; // lib.inc.php

echo '文件后缀' . pathinfo($file, PATHINFO_EXTENSION), 'br/>';// php

echo '文件名称' . pathinfo($file, PATHINFO_FILENAME), 'br/>'; // lib.inc  // PHP >= 5.2.0