(PHP 4 >= 4.0.5, PHP 5, PHP 7)
ob_iconv_handler — Convert character encoding as output buffer handler
ob_iconv_handler ( string $contents , int $status ) : string
Converts the string encoded in internal_encoding to output_encoding.
internal_encoding and output_encoding should be defined in the php.ini file or in iconv_set_encoding().
See ob_start() for information about this handler parameters.
See ob_start() for information about this handler return values.
Example #1 ob_iconv_handler() example:
<?php
iconv_set_encoding("internal_encoding", "UTF-8");
iconv_set_encoding("output_encoding", "ISO-8859-1");
ob_start("ob_iconv_handler"); // start output buffering
?>
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https://www.php.net/manual/en/function.ob-iconv-handler.php