Note: Now that file() is binary safe it is 'much' slower than it used to be. If you are planning to read large files it may be worth your while using fgets() instead of file() For example:

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<?php

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$fd = fopen ("log_file.txt", "r");

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while (!feof ($fd)) 

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{

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   $buffer = fgets($fd, 4096);

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   $lines[] = $buffer;

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}

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fclose ($fd);

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?>

​

​

The resulting array is $lines.

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I did a test on a 200,000 line file. It took seconds with fgets()  compared to minutes with file().