Determining SQL discourse correctness in php

Php verifies the correctness of SQL statements in the background, but cannot execute this statement. If an error occurs, use the function output error message. Determining SQL statement correctness in php
Verify the correctness of the SQL statement in the background, but you cannot execute this statement. If an error occurs, use the function output error message. Share:
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Mysql_query ($ SQL) or die (mysql_error ());
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Mysql_query ($ SQL) or die (mysql_error (); although it will be executed, if the error occurs, it will not affect the data in the database. Feel free to use it.