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Variables | PHP Basics.

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What Is A Variable.

A variable is used to produce another value. Putting it in a casual form, a variable is like an alias name. They can be defined as a string or a numeric value.

Type Of Variables.

In PHP, a variable always starts with a dollar sign [$], followed by an equal sign [=] and then,

  • A chosen word placed inside quotations ["String"].
  • A number without quotations [10].
  • As addition [5+10]

and all ending with a semicolon [; ].

See Illustration below.

$a = "Test";
print $a;
//This will print a string value [Test] using the variable $a

$num = 10; print $num; //This will print a Number value [10] using the variable $num $add = 5+10; print $add; //This will print an equal value of [15] or [5+10] using the variable $add ?>

Combining Variables' Values.

Values can also be combined using a period [.] this will reproduce another value.

Variables can also be used as values for a new variable.

See Illustration below.

$a = 3;
$b = 2;
$c = $a.$b;
//Now the variable $c sets its value to [32] using the values of $a and $b

$d = $c + 10 ;
echo $d;
/*$d will echo a value of [42], because its vaule $c already 
has a value of [32] plus [10], bringing its new value to [42]

$e = "Years";
$f = $d.$e;
echo $f;
//$f will echo a value of [42Years], blending numeric and string values.

As you can see variables can be twisted and crushed into so many directions. Just look forward to some more variable examples. coming soon.

Variables | PHP.


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