What is the significance of using fread function correctly when converting file content to hexadecimal in PHP?

When converting file content to hexadecimal in PHP, it is important to use the `fread` function correctly to read the file contents in chunks and convert each chunk to hexadecimal. This ensures that large files can be processed efficiently without memory issues. By reading the file in chunks, you can convert the content to hexadecimal gradually without loading the entire file into memory at once. 

<?php
$filename = 'example.txt';
$handle = fopen($filename, 'rb');
$hexContent = '';

if ($handle) {
    while (!feof($handle)) {
        $chunk = fread($handle, 1024); // read 1KB at a time
        $hexContent .= bin2hex($chunk); // convert chunk to hexadecimal
    }
    fclose($handle);
    
    echo $hexContent;
} else {
    echo "Error opening file.";
}
?>

Keywords

fread file content hexadecimal conversion PHP

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