how to remove BOM with php?

is there a way to remove BOM after creation of a file?
here's the script that I create my file with

<?php
function writeUTF8File($filename,$content) {
        $f=fopen($filename,"w");
        # Now UTF-8 - Add byte order mark
        fwrite($f, pack("CCC",0xef,0xbb,0xbf));
        fwrite($f,$content);
        fclose($f);
}
?>

PHP:

I found this function but I don't know how to use it:

<?php
function removeBOM($str=""){
        if(substr($str, 0,3) == pack("CCC",0xef,0xbb,0xbf)) {
                $str=substr($str, 3);
        }
        return $str;
}
?>

PHP:

 

I have used the file and below were the file having BOM in them.



These files had UTF8 BOM, but i cleaned them:

administrator/components/com_virtuemart/tables/categories.php
administrator/components/com_virtuemart/tables/products.php
administrator/components/com_virtuemart/views/category/tmpl/edit_categoryform.php
administrator/language/de-DE/de-DE.plg_vmcustom_specification.ini
administrator/language/de-DE/de-DE.plg_vmpayment_heidelpay.ini
administrator/language/en-GB/en-GB.com_jce.sys.ini
administrator/language/en-GB/en-GB.mod_virtuemart_currencies.ini
administrator/language/en-GB/en-GB.mod_virtuemart_manufacturer.ini
administrator/language/en-GB/en-GB.mod_virtuemart_product.ini
administrator/language/en-GB/en-GB.plg_vmcustom_specification.ini
administrator/language/fr-FR/fr-FR.plg_vmcustom_specification.ini
administrator/language/fr-FR/fr-FR.plg_vmpayment_moneybookers.ini
administrator/manifests/files/TinyMCE_es-ES.xml
administrator/manifests/packages/pkg_es-ES.xml
components/com_virtuemart/assets/css/vmsite-ltr.css
components/com_virtuemart/assets/js/languages/jquery.validationEngine-es.js
components/new/com_virtuemart/assets/css/vmsite-ltr.css
components/new/com_virtuemart/assets/js/languages/jquery.validationEngine-es.js
installation-old/language/bn-BD/bn-BD.ini
installation-old/language/lo-LA/lo-LA.ini
installation-old/language/mk-MK/mk-MK.xml
installation-old/language/ml-IN/ml-IN.ini
installation-old/language/mn-MN/mn-MN.ini
installation-old/language/sy-IQ/sy-IQ.ini
installation-old/language/th-TH/th-TH.ini
installation-old/language/ur-PK/ur-PK.ini
installation-old/language/ur-PK/ur-PK.xml
javascript/lang/calendar-br.js
javascript/lang/calendar-el.js
javascript/lang/calendar-fi.js
javascript/lang/calendar-pl-utf8.js
language/en-GB/en-GB.com_virtuemart-org.ini
language/en-GB/en-GB.com_virtuemart.ini
language/fr-FR/fr-FR.mod_virtuemart_category.sys.ini
modules/mod_virtuemart_product/mod_virtuemart_product.php

 

Do you mean from the file after you've written it?

writeUTF8File is adding the BOM so if that's where you want to "remove" it, just don't add it. Just comment out that line (or delete it).

[COLOR="#008000"]//fwrite($f, pack("CCC",0xef,0xbb,0xbf));[/COLOR]

Code (markup):