Php pdo prepare in a function returns?

This is most likely due to a failed preparation Depending on error handling, PDO, instead of raising an exception may just return false If the database server cannot successfully prepare the statement, PDO::prepare() returns FALSE or emits PDOException (depending on error handling) Not entirely sure where this behaviour is defined, to be honest Update: here it is The default behaviour is to fail silently. You need to set PDO::ATTR_ERRMODE to PDO::ERRMODE_EXCEPTION for exceptions to be risen at all times $dbh->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION ).

This is most likely due to a failed preparation. Depending on error handling, PDO, instead of raising an exception, may just return false . If the database server cannot successfully prepare the statement, PDO::prepare() returns FALSE or emits PDOException (depending on error handling).

Not entirely sure where this behaviour is defined, to be honest.... Update: here it is. The default behaviour is to fail silently. You need to set PDO::ATTR_ERRMODE to PDO::ERRMODE_EXCEPTION for exceptions to be risen at all times.

$dbh->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION ).

Add: var_dump($stmt); After: $stmt = $this->PrepareQ($index); Probably there's something wrong with it so $this->PrepareQ($index); is returning null, or an object that has no execute method, var_dumping the variable will help knowing what that variable is and debugging this issue.

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