PHP-manual | ||
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Föregående | Nästa |
(no version information, might be only in CVS)
PDO::exec -- Execute an SQL statement and return the number of affected rowsVarning |
Den h�r funktionen �r EXPERIMENTELL. Dess beteende, namnet p� den, och allt annat dokumenterat om den h�r funktionen kan �ndras i framtida utg�var av PHP. Anv�nd den p� egen risk. |
PDO::exec() executes an SQL statement in a single function call, returning the number of rows affected by the statement.
PDO::exec() does not return results from a SELECT statement. For a SELECT statement that you only need to issue once during your program, consider issuing PDO::query(). For a statement that you need to issue multiple times, prepare a PDOStatement object with PDO::prepare() and issue the statement with PDOStatement::execute().
PDO::exec() returns the number of rows that were modified or deleted by the SQL statement you issued. If no rows were affected, PDO::exec() returns 0.
Varning |
Den h�r funktionen kan returnera det booleska v�rdet FALSE, men den kan ocks� returnera ett icke-booleskt v�rde som �r likv�rdigt med FALSE, till exempel 0 eller "". V�nligen l�s sektionen om booleska datatyper f�r mer information. Anv�nd ===- operatorn f�r att testa returv�rdet fr�n den h�r funktionen. |
The following example incorrectly relies on the return value of PDO::exec(), wherein a statement that affected 0 rows results in a call to die():
<?php |
Föregående | Hem | Nästa |
PDO::errorInfo | Upp | PDO::getAttribute |