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PHP Variables
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Variables are "containers" for storing information. How to Declare PHP Variables In PHP, a variable starts with the $ sign, followed by the name of the variable: Examples : $txt = "Hello world!"; $x = 5; $y = 10.5;
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A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume. A variable starts with the $ sign, followed by the name of the variable A variable name must start with a letter or the underscore character
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A variable name cannot start with a number A variable name can only contain alpha- numeric characters and underscores (A-z, 0- 9, and _ ) Variable names are case-sensitive ($age and $AGE are two different variables) Note : Remember that PHP variable names are case-sensitive!
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The PHP echo statement is often used to output data to the screen. The following example will show how to output text and a variable:
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Output will be I love Pakistan! Another example for variable addition: Code :
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PHP automatically converts the variable to the correct data type, depending on its value. In other languages such as C, C++, and Java, the programmer must declare the name and type of the variable before using it.
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