Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Function - User input string to EN sanitized filename, directory, slug, identifier, etc
<?php
// @last https://3v4l.org/iSgi8
// @same http://stackoverflow.com/a/34908708/2418655
// Start sample
$raw_str = '.....&lt;div&gt;&lt;/div&gt;<script></script>&amp; Weiß Göbel 中文百强网File name %20 %20 %21 %2C Décor \/. /. . z \... y \...... x ./ “This name” is & 462^^ not &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; = that grrrreat -][09]()1234747) საბეჭდი-და-ტიპოგრაფიული';
$fallback_str = 'generated__' . date('Y-m-d_H-m_A');
$bad_extension = '....t&+++a()r.gz[]';
echo str_file($raw_str, '_', $bad_extension, $fallback_str);
// End sample
// Returns filesystem-safe string after cleaning, filtering, and trimming input
function str_file_filter(
$str,
$sep = '_',
$strict = false,
$trim = 248) {
$str = strip_tags(htmlspecialchars_decode(strtolower($str))); // lowercase -> decode -> strip tags
$str = str_replace("%20", ' ', $str); // convert rogue %20 into spaces
$str = preg_replace("/%[a-z0-9]{1,2}/i", '', $str); // remove hexy things
$str = str_replace("&nbsp;", ' ', $str); // convert all nbsp into space
$str = preg_replace("/&#?[a-z0-9]{2,8};/i", '', $str); // remove the other non-tag things
$str = preg_replace("/\s+/", $sep, $str); // filter multiple spaces
$str = preg_replace("/\.+/", '.', $str); // filter multiple periods
$str = preg_replace("/^\.+/", '', $str); // trim leading period
if ($strict) {
$str = preg_replace("/([^\w\d\\" . $sep . ".])/", '', $str); // only allow words and digits
} else {
$str = preg_replace("/([^\w\d\\" . $sep . "\[\]\(\).])/", '', $str); // allow words, digits, [], and ()
}
$str = preg_replace("/\\" . $sep . "+/", $sep, $str); // filter multiple separators
$str = substr($str, 0, $trim); // trim filename to desired length, note 255 char limit on windows
return $str;
}
// Returns full file name including fallback and extension
function str_file(
$str,
$sep = '_',
$ext = '',
$default = '',
$trim = 248) {
// Run $str and/or $ext through filters to clean up strings
$str = str_file_filter($str, $sep);
$ext = '.' . str_file_filter($ext, '', true);
// Default file name in case all chars are trimmed from $str, then ensure there is an id at tail
if (empty($str) && empty($default)) {
$str = 'no_name__' . date('Y-m-d_H-m_A') . '__' . uniqid();
} elseif (empty($str)) {
$str = $default;
}
// Return completed string
if (!empty($ext)) {
return $str . $ext;
} else {
return $str;
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment