edainworks.com :: VGR :: testing the methods for changing an uploaded file's name for successful URI, DB and filesystem use.

The Problem : when a user submits a local file via HTTP upload, the file name has usually to be transformed so as to pose no problem when used to display the document or image (in an URI, so think urlencoding(), huh ?;-), when stored in the DB (so think addslashes(), huh ? ;-) and when stored in the filesystem (whatever this is : linuxfs, NTFS, FAT... accepting or not spaces, parentheses, accentuated characters, quotes, the % sign...).

The Symptom : broken images, filesystem errors, files stored as simply urlencoded() are unretrievable...

function preparar_nom_archivo($nom_archivo) { // Dany Alejandro Cabrera (20-Mar-2009 02:03) http://www.php.net/manual/fr/function.str-replace.php
    $arr_busca = array(' ','á','à','â','ã','ª','Á','À',
    'Â','Ã', 'é','è','ê','É','È','Ê','í','ì','î','Í',
    'Ì','Î','ò','ó','ô', 'õ','º','Ó','Ò','Ô','Õ','ú',
    'ù','û','Ú','Ù','Û','ç','Ç','Ñ','ñ');
    $arr_susti = array('-','a','a','a','a','a','A','A',
    'A','A','e','e','e','E','E','E','i','i','i','I','I',
    'I','o','o','o','o','o','O','O','O','O','u','u','u',
    'U','U','U','c','C','N','n');
    $nom_archivo = trim(str_replace($arr_busca, $arr_susti, $nom_archivo));
    return preg_replace('/[^A-Za-z0-9\_\.\-]/', '', $nom_archivo);
    //VGR27042011 MOD, some moron deprecated ereg_replace() in PHP 5.3... was : return ereg_replace('[^A-Za-z0-9\_\.\-]', '', $nom_archivo);
} 

9. Conclusion top

En conclusion les performances ne sont pas les mêmes pour les quatre méthodes ; la plus propre est probablement la première mais la plus efficace en PHP 5.3+ est maintenant strtr() car preg_replace() est plus lente que ereg_replace() qui a été dépréciée (sans raison IMHO).
Cordialement,

Conclusion : performance are not the same for the four methods tried here. The best and cleaner one is probably the first but the most efficient in PHP 5.3+ is now strtr() because preg_replace() seems slower than ereg_replace() which has been deprecated (no good reason why IMHO).
Best regards,

VGR27042011 REM some moron deprecated ereg_replace() in PHP 5.3... So I had to modify all the ereg_replace() calls with preg_replace() - all you've to do if you use a REXP is to check the presence of the REXP reparator at first and last places in the format string. Example : '[a-z]' should become '/[a-z]/'.

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Last update 2023-12-21 12:38:15

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