PHP Function List
Sorry, but the function strupper is not in the online manual. Perhaps you misspelled it, or it is a relatively new function that hasn't made it into the online documentation yet. The following are the 20 functions which seem to be closest in spelling to strupper (really good matches are in bold). Perhaps you were looking for one of these:
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strtoupper mb_strtoupper strpbrk streamwrapper ctype_upper strptime strtr |
solrquery strrev strlen strstr strchr strpos strcmp |
strspn str_repeat strtolower strncmp settype strrpos |
If you want to search the entire PHP website for the string "strupper", then click here.
For a quick overview over all documented PHP functions, click here.