Php read text file lines into array

This function reads a file up to length number of bytes. You could use this technique to read a 1GB file using just 1MB of memory in about iterations. If you want to read files line by line into an array, using the file function would be the right choice.

If the files you are reading are very large and you have no plans to store the individual lines in an array, using the fgets function would be the right choice. The amount of memory that your script needs will only depend on the length of largest line in the file that you are reading. This means that the file could be over 1GB in size but if the individual lines are not very large, you will never exhaust your memory. If you are reading large files and have no idea how long individual lines could be in that particular file, using fread would be your best bet.

This function lets you specify the size of chunks in which you want to read the file. Another advantage of fread over fgets is that you will not have to perform a lot of iterations if the file you are reading contains large number of empty lines.

The lines to examine are in blue; the rest you have met before get a file handle, loop round, use fgets to read the line. The first line to note is this:. If you remember the string section, you'll also be familiar with the explode function. Attila Nagy Attila Nagy 91 1 1 silver badge 1 1 bronze badge. Nick Andren Nick Andren 2 2 silver badges 4 4 bronze badges. Brian Leishman Brian Leishman 7, 8 8 gold badges 54 54 silver badges 84 84 bronze badges.

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