eregi_replace driving me nuts

Hi, Considering the following script : ==================================================== <? $dico = array( "abaisser" => "def.php?id=9", "singer" => "def.php?id=9" ); $texte = "Abaisser Vous abaisserez la pate, abaisser.Singer"; while(list($mot,$def) = each($dico)) { $pattern = "(".$mot.")[^[:alpha:]]"; echo "$pattern<BR>"; $texte = eregi_replace($pattern, "<a href=\"$def\">\\0</a>", $texte); } echo $texte; ?> ========================================================= What I'm trying to do: I'm trying to have the proper variables for the eregi_replace so that each word in the $dico array is replaced by a link to its definition respecting the following rules : -only exact match makes a link to the definition, for example : - "abaisseraient" doesn't make a link - "reabaisser" doesn't make a link - " abaisser," or "smthg.Abaisser " makes a link on "abaisser" only, so that the whitespace, comma or dot isn't part of the link - "abaisser" a the end of the string make a link -I don't want to make a link when already in a link : - "<a href='some_page.php'>tu peux abaisser le levier</a>" doesn't not make a link on "abaisser" I know I'm bad with regex and really need some help on this. This would be really appreciated. Regards, Michael