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<?php $text = 'Título ú Nota ó !¡ ! '; $text = preg_replace('/[^a-zA-Z0-9, ]/i','',$text); echo $text; $data = "Thäre!wouldn't%bé#äny"; $new_data = str_replace ("'", "", $data); $new_data = preg_replace ('/[^\p{L}\p{N}]/u', '_', $new_data); var_dump ( $new_data );
Output for git.master, git.master_jit, rfc.property-hooks
Ttulo Nota string(23) "Thäre_wouldnt_bé_äny"

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