In PHP, you declare a variable by prefixing the variable name with a dollar sign ($) followed by the name you want to give to your variable. Variable names can consist of letters, numbers, and underscores, but they cannot start with a number.
Here is an example of how to declare a variable in PHP:
<?php
$myVariable = "Hello, World!";
echo $myVariable; // Outputs: Hello, World!
?>
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