Parsing CSV File Using Perl
CSV is a comma separated value data file is a physical ASCII file structure that contains records whose values are delimited or separated by commas. CSV is a common file type which can be imported into spreadsheet applications such as MS-Excel, database applications such as MS-Access, and contact databases such as MS-Outlook, ACT, Goldmine, etc. The format dates back to the early days of business computing. For this reason, CSV files are common on all computer platforms.
CSV is one implementation of a delimited text file, which uses a comma to separate values (where many implementations of CSV import/export tools allow an alternate separator to be used; as is shown in the MS Access screen shot, below). However CSV differs from other delimiter separated file formats in using a " (double quote) character around fields that contain reserved characters (such as commas or newlines). Most other delimiter formats either use an escape character such as a backslash, or have no support for reserved characters.
In some application you might need to allow user to upload a CSV data file, which is processed and inserted to the DB, thereby avoiding the direct interaction of the user with the DB, the user can prepare his/her report/data in MS Excel, or a similar spreadsheet program which can be later uploaded using a web interface.
The simplest solution would be to read the uploaded file line-by-line and splitting the lines by commas, but this is not fool proof, just in case the one of the fields contain a comma which is not a delimiter but a part of the data, then your code goes for a toss. So, we we'll use the popular CSV parsing module, Text::CSV to get the work done for us.
This script receives a CSV file via file upload, and parses the CSV file and display them in a HTML table. Hope this is helpful to you.
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