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22/02/2014 Categories: PHP. No Comments on Variables in PHP

A variable is a named location in memory to store data temporarily. PHP is dynamically typed language. So, there is no need for mentioning the data type of a variable.


The type will be detected automatically based on the value assigned to the variable. A variable can be created as shown below:


$var1 = 10;


A variable which is not assigned a value contains NULL. In expressions containing numbers, NULL will be coerced to 0 and in case of strings, NULL will be coerced to an empty string. A variable can be printed as shown below:


print(“Value of var1 is: $var1”);


A variable can be checked if it contains a value other than NULL by using the function IsSet. This function returns TRUE if the variable contains a non-NULL value and FALSE if it contains a NULL value.


A video tutorial on declaring and using variables in PHP scripts:


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