3-Variable in php with previous commands practice (variable swapping)
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A variable in PHP is a name of memory location that holds data. A variable is a temporary storage that is used to store data temporarily.
In PHP, a variable is declared using $ sign followed by variable name.
Syntax of declaring a variable in PHP is given below
$variablename=value;
Loosely typed language
PHP is a loosely typed language, it means PHP automatically converts the variable to its correct data type.