What tools or methods can be used to analyze and identify potential issues with line breaks in exported text files before importing into MySQL using PHP?

When exporting text files that contain line breaks, it is important to ensure that the line breaks are handled properly before importing the data into MySQL using PHP. One common issue is that different operating systems use different characters to represent line breaks (e.g., Windows uses "\r\n", Unix uses "\n", and Mac uses "\r"). To address this, you can use PHP functions like `str_replace()` to standardize the line breaks to a consistent format before importing the data into MySQL.

// Read the contents of the text file
$fileContents = file_get_contents('exported_data.txt');

// Standardize line breaks to Unix format
$fileContents = str_replace("\r\n", "\n", $fileContents); // Windows to Unix
$fileContents = str_replace("\r", "\n", $fileContents); // Mac to Unix

// Now you can proceed with importing the data into MySQL
// using the standardized $fileContents