What are some best practices for opening and reading a text file in PHP before extracting specific data?

When opening and reading a text file in PHP before extracting specific data, it is essential to follow best practices to ensure efficient and error-free processing. One common approach is to use the `fopen()` function to open the file, check if the file was opened successfully, read its contents using `fgets()` or `fread()`, and then close the file using `fclose()` to free up system resources. 

$filename = 'data.txt';
$file = fopen($filename, 'r');

if ($file) {
    while (($line = fgets($file)) !== false) {
        // Process each line of the file here
        echo $line;
    }

    fclose($file);
} else {
    echo "Error opening file.";
}

Keywords

file handling fopen fread fclose error handling data extraction

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