Use mysql_real_escape_string(), after you've connected to your database. If that function doesn't work, use mysql_escape_string() or addslashes(). Never leave your database input vulnerable to attack.
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Placeholders in an abstraction layer such as PDO in PHP allows for caching and security in database queries (they fight SQL injection).
query() or mysql_query() are outdated, insecure functions used for communicating queries or "requests" to a database.
By sending messages to the MySQL server, you can communicate with the database. To submit SQL queries to the database, you use PHP functions. You don't need to know how to communicate with MySQL because PHP takes care of that. You only need to be familiar with SQL queries and PHP functions. To learn more about data science please visit- Learnbay.co
Use PDO (PHP DATA OBJECTS) to write your queries. They include support most major database
PHP hosting is a type of scripting language that adds functions to web content. PHP is mainly used for forums, shopping sites, and anything else that would require complex database queries and setups.
PHP is a dynamic, server-side, web scripting language. It is capable of making connections to a database, and storing information to that database as well as reading queries form the DB. This means that PHP allows for the creation of dynamic web pages that change over time, as opposed to static HTML pages that are rewritten once and do not change without intervention by the page owner.
queries are always saved and can therefore be run on the most up to date database information
queries are always saved and can therefore be run on the most up to date database information
Query is a statement which user gives in database.
Queries are done in a database.
Please refer link. The presentation gives complete understanding of how to deal with database (Mysql) with php.
database