Tag: function
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PHP Magic Constants

PHP Magic Constants

A constant is an identifier for a simple value (number, text) that cannot be changed during script execution. Constants are case-sensitive and by convention are written in uppercase. Alongside many constants automatically available during script execution, there are also "magic" constants whose value depends on where they are read.

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MySQL: User-Defined Variables in SQL Queries

MySQL: User-Defined Variables in SQL Queries

This time my interest fell specifically on user-defined variables. They can be broadly divided into two categories: declared variables, used in procedures and functions, and undeclared variables, also used in procedures and functions, but which can be used in an SQL query "in-line".

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Views: 1957 (22)


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