security

Guard Against XXE When Reading An Untrusted Excel File In PHP Using PHPSpreadSheet An .xlsx is a ZIP full of XML, so reading one from a stranger means parsing hostile XML on your own server. PhpSpreadsheet’s XmlScanner is already on by… August 10, 2026 · PhpSpreadsheet Prevent Formula Injection In Excel Exports In PHP Using PHPSpreadSheet A user-supplied value that starts with =, +, - or @ becomes a live formula when the file is opened. See how PhpSpreadsheet triggers formula injection by default,… August 7, 2026 · PhpSpreadsheet Handle An Uploaded Excel File In PHP Using PHPSpreadSheet This article shows how to accept an Excel file uploaded from an HTML form and read it with the latest version of PhpSpreadsheet using plain PHP. Reading the… July 28, 2026 · PhpSpreadsheet