usefilter_var () tovalidateemailsyntaxandcheckdnsrr () toverifydomainmxrecords.example : $ email = "user@example.com"; if (f ilter_var ($ ???, filter_validate_email) && checkdnsrr (Explode ( '@', $ email) [1], 'mx')) {echo "validandDeliverableEmail & qu

? ????? ??? ?? ???? MySQL?? ??? ??? ???? ?? ??? ??? ?? ? ?? ??? ?? ??? ?????. ?? ?? ??? ??? ?? ??? ?? (? : "END"? "CANCEL"? ?? ? ?? ? ??? ?? ???? ???? ??? ??? ??? ??? ???? ??? ???? ?? ??? ??? ???? ??? ?????. ????? ? ??? ?? ?? ??? ??? ???? ?? ??? ??? ? ?? ?? ? Coalesce? ???? ?????.

AseUnserialize (Serialize ($ obj))? AllDataisserializable ??? ?? FordeepCopying; ??? ???, ubstract__clone () tomanuallyduplicateNestEdObjectSandavoidshartReferences.

USEARRAY_MERGE () TOCOMBINEARRAYS, DUCRITINGDUPLICATESTRINGKEYSANDENTEXINGUMERICEYS; FORSIMPLERCONCATENATION, ?? ??? 55.6, USETHESPLATOPERATOR [... $ array1, ... $ array2].

?? ???? ? ?? ???? inphorganizecodecodecodeandnamingnamingconflictsbygroupingclasses, ?????, ??, andconstantsOnspecificname.2.defineanamesUsUsingThenamesPaceyWordAtTHETOPOFOFILE, AFFORBINSPACENAME, suchATESKEYSTOI

toupdateadaBasereCordInphp, FirstConnectusingpdoorMysqli, whenEseprepredStatementStoExecuteAcureCuresqlupDateQuery.example : $ pdo = newpdo ( "mysql : host = localhost; dbname = your_database", $ username, $ username, $ sql = "squer erestemail);

The__call ()? MethodsibleorundorundeRunded?? ?? ? ? MethodStrigged? ????, themodnameandarguments, asshowningwhendingderdefinedmethodslikesayhello ()

useathinfo ($ filename, pathinfo_extension) togetThefileExtension; itreliablyHandleSmultipledOtsededGecases, returningTheextension (? : "pdf") oranEmptyStringifnoneExists.