PHP: Variables & Strings
In this tutorial I will explain:
•What a Variable and String are…
•The purpose of a Variable and a String…
•And an Example of a Variable and a String.
A Variable is a place holder that holds a value (I.E. “John” or 42). Once you set a Variable, you can use it over and over in your PHP script. Every single variable in PHP starts with a $ sign. The correct way of setting (Declaring) a variable in PHP is exampled in the following script:
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<?php
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$variable_name = value;
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?>
There are multiple datatypes for a value. A string is a multiple series of characters: “John Doe”. Strings will always be in quotation marks. It is very easy to output a string in PHP, a command called ‘echo’:
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<?php
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/* This is an example for the ‘echo’ command */
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/* Display the text in the quotation marks */
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echo "This is a String.";
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?>
An Example of the use of a variable and a string is shown below:
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<?php
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/* set the variables */
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$name = "John Doe";
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$age = "32";
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echo "Hello $name, you are $age years old.";
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?>
The output of this script would display as the following:
John Doe you are 32 years old.
