PHP script to prevent two equal data from being entered (Mysql)

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PHP script to prevent two equal data from being entered (Mysql)

Asked 5 years, 10 months ago

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I am developing a system for my school’s library and would like to know how to make a script in PHP, with Mysql database, which, at the time of registration, check if there is a record with that CPF.

1

Easier and safer to place the field of CPF as UNIQUE, this way the database will not allow repeated values and will return an error while trying.

– Thiago Magalhães

2018/08/14 at 20:04
Right, but how can I customize this error, like; "This number has already been registered."

– Gabriel Camurça

2018/08/14 at 20:08
These errors have a código and a mensagem default. You can force the error and catch the código returned, having it, just do a validation for when the error has this código, return the desired message.

– Thiago Magalhães

2018/08/14 at 20:10
Understood, but you can give me an example (with code)?

– Gabriel Camurça

2018/08/14 at 20:11
Later I put, I’m not in time to make the code. You’re using MySQLi or PDO ?

– Thiago Magalhães

2018/08/14 at 20:13

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