What potential issues can arise when using the PHP function file() to access a large 3 MB file?

When using the PHP function file() to access a large 3 MB file, potential issues that can arise include memory exhaustion due to loading the entire file into memory at once. To solve this issue, you can use the fopen() function to open the file in read mode and read its contents line by line using fgets(). 

$file = fopen('large_file.txt', 'r');
if ($file) {
    while (($line = fgets($file)) !== false) {
        // Process each line of the file here
    }
    fclose($file);
} else {
    echo "Error opening file.";
}

Keywords

file() large file memory limit performance timeout

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