Php open file readline

Ask Question. Asked 9 years, 2 months ago. Active 7 months ago. Viewed k times. I want to read a file line by line, but without completely loading it in memory. My file is too large to open in memory, and if try to do so I always get out of memory errors. The file size is 1 GB. Would you like to mark as answer on any of the following? Add a comment.

Active Oldest Votes. Mark Garcia How does this account for the too large to open in memory part? You are not reading the entire file in memory. The max memory needed to run this depends on the longest line in the input. ToolmakerSteve Then define what should happen. If you want you can just print the message "Line too long; giving up. Can a line contain a boolean false? If so then this method would stop without reaching the end of file. The Example 1 on this URL php.

In the comment section on that page people report that fgets doesn't always return correct values, so it's safer to use feof as the loop conditional. Show 2 more comments. As Cuse70 said in his answer this will lead to an infinite loop if the file does not exist or can't be open.

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Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked Related Hot Network Questions. In many cases, you may need to take data from users. You can direct the users to send the data as a text file and inform the user that the required data should be per line basis.

Your email address will not be published. Please enable JavaScript to submit this form. By Faruque Ahamed Mollick. If there is no more data to read, then false is returned. Example 1 readline Example.

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