Removing Special Characters from uploaded file name in PHP

Uploaded file name is very vital to insert, update and retrieve media or other data. sometimes during uploading files filename contains some special characters (like $%^& etc.) which create complexity. that’s why we try to avoid special characters in our filename in the database. we can remove special characters from the uploaded filename by using a simple regular expression.

preg_replace(‘/[^a-zA-Z0-9_ -]/s’,”,$string);

If we want to keep some specific special character like “(  ) / . % – &” then we just need to change it as follows

preg_replace(‘/[^a-zA-Z0-9_ %\[\]\.\(\)%&-]/s’,”,$string);    [It removes “(  ) / . % – &” from filename]


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