- var_dump: documentation ( source)
- array_flip: documentation ( source)
- get_html_translation_table: documentation ( source)
<?php
$table = array_flip(get_html_translation_table(HTML_ENTITIES, ENT_COMPAT | ENT_HTML401, 'cp1252'));
var_dump($table['Ÿ'], $table['‘'], $table['’'], $table['“'], $table['”']);