How to Remove BOM Encoding from CSV Files in PHP?

Removing BOM () from Imported .csv File

When importing .csv files, the presence of a Byte Order Mark (BOM) can cause encoding issues. Here's a comprehensive solution to remove the BOM from imported .csv files:

Issue:

Struggling to remove BOM using preg_replace or str_replace.

Code Attempt:

<code class="php">$filepath = get_bloginfo('template_directory')."/testing.csv";
// ...
$file = fopen($filepath, "r") or die("Error opening file");
// ...</code>

Solution:

1. Use the file_get_contents() and file_put_contents() functions to read and overwrite the file with the BOM removed:

<code class="php">// Read the file contents
$content = file_get_contents($filepath);

// Remove the BOM
$content = str_replace("\xEF\xBB\xBF",'', $content);

// Overwrite the file with the updated content
file_put_contents($filepath, $content);</code>

2. Use a custom function to detect and remove the BOM:

<code class="php">function removeBomUtf8($s){
  if(substr($s,0,3)==chr(hexdec('EF')).chr(hexdec('BB')).chr(hexdec('BF'))){
       return substr($s,3);
   }else{
       return $s;
   }
}</code>

3. Reopen the file and process it as before.

Note:

The FILE_PUT_CONTENTS function automatically closes the file, so there's no need to manually close it with fclose().

By implementing these solutions, you can successfully remove the BOM from imported .csv files and ensure correct data parsing.

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