php database null value

The special NULL value represents a variable with no value. NULL is the The...

The special NULL value represents a variable with no value. NULL is the There is only one value of type null, and that is the case-insensitive constant NULL.

⬇ Download Full Version

up vote 3 down vote. Make sure that the value of the column is really NULL ...

up vote 3 down vote. Make sure that the value of the column is really NULL and not an empty string or 0. share|improve this answer. answered.

⬇ Download Full Version

Turn on display_errors and set error_reporting to E_ALL (either in dwn.220....

Turn on display_errors and set error_reporting to E_ALL (either in dwn.220.v.ua or in a htaccess). This should reveal any non-obvious mistakes.

⬇ Download Full Version

Probably because PHP doesn't convert 'null' into 'NULL&...

Probably because PHP doesn't convert 'null' into 'NULL'. You are probably just To fix this, check for Null Values before you do the query.

⬇ Download Full Version

Normally, you add regular values to mySQL, from PHP like this: function add...

Normally, you add regular values to mySQL, from PHP like this: function addValues($val1, $val2) { db_open(); // just some code ot open the DB.

⬇ Download Full Version

Say you want to check if field/column “foo” from a given row of the table “...

Say you want to check if field/column “foo” from a given row of the table “bar” when > returned by a mySQL query is null. You just use the.

⬇ Download Full Version

This is one example where using prepared statements really saves you some t...

This is one example where using prepared statements really saves you some trouble. In MySQL, in order to insert a null value, you must specify.

⬇ Download Full Version

PHP treats NULL, false, 0, and the empty string as equal. The table also sh...

PHP treats NULL, false, 0, and the empty string as equal. The table also shows some tricky values regarding the null comparison. (ϕ denotes.

⬇ Download Full Version

instead detecting NULL values in php try to detect them im MySQL: and an em...

instead detecting NULL values in php try to detect them im MySQL: and an empty string once you've queried the database into a PHP result?

⬇ Download Full Version

Well organized and easy to understand Web building tutorials with lots of e...

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, and XML.

⬇ Download Full Version

PHP has different functions which can be used to test the value of a variab...

PHP has different functions which can be used to test the value of a variable. isset — Determine if a variable is set and is not NULL. In other.

⬇ Download Full Version

Hi, Here's my question: How do I pass a NULL value in a variable to a ...

Hi, Here's my question: How do I pass a NULL value in a variable to a MySQL DB? Here's an overview of my problem: I have a PHP page that processes code.

⬇ Download Full Version

In this tutorial you can learn how to work with NULL in MySQL tables: Inser...

In this tutorial you can learn how to work with NULL in MySQL tables: Insert, Update, and Select columns with NULL value.

⬇ Download Full Version

PHP & MySQL Tutorial - Null Value & Empty Method Cool point about h...

PHP & MySQL Tutorial - Null Value & Empty Method Cool point about how the "empty" function.

⬇ Download Full Version

PHP/MySQL: Setting a field to NULL if a form field is left blank or (NULL) ...

PHP/MySQL: Setting a field to NULL if a form field is left blank or (NULL) and update a reall NULL value into a date column in a MySQL database anymore.

⬇ Download Full Version