It seems if you are trying to do something similar to the Google 'Did you mean:' suggestions and are selecting the first word given by the pspell_suggest[] function, then it will not work well with custom dictionaries and replacements. Take the following code for example:
This works fine most of the time, and gives suggestions to what you meant when inserting a spelling mistake with most inputs. However, if you specify a custom replacement and then search for the misspelt word that you specified, then if it is not the first returned suggestion it wont be used in the 'Did you mean' end result. What you need to do is open up the custom dictionary using fopen and fread, and then for each of the suggested words, check if they are in the dictionary. If the suggested word is in the custom dictionary then use it in the 'Did you mean' part, if not, discard it and try the next. Hope this helps anyone who comes across this problem with trying to get more accurate suggestions.
I attempted to create a class that takes a list of phrases and compares that to the user inputs. What I was trying to do is get things like Porshre Ceyman to correct to Porsche Cayman for example.
This class requires an array of correct terms $this->full_model_list , and an array of the user input $search_terms. I took out the contruct so you will need to pass in the full_model_list. Note, this didn't fully work so I decided to scrap it, it was adapted from someone looking to correct large sentences ...
You would call it like so:
$sth = new SearchTermHelper;
$resArr = $sth->spellCheckModelKeywords[$search_terms]
Code [VERY BETA] :