DATEVALUE

Converts a date in the form of text to a serial number.

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Warning: The PHPExcel DATEVALUE() function accepts a wider range of date formats than MS Excel's DATEFORMAT() function.

Date String	Formula	Excel DateStamp	Formatted DateStamp
26 March 2012	=DATEVALUE(A1)	Fatal error: Array and string offset access syntax with curly braces is no longer supported in /home/apolo/public_html/qua_sgdpr/vendor/phpoffice/phpexcel/Classes/PHPExcel/Calculation/Functions.php on line 324