PHP Variables, Special Symbols in PHP

In any language variables are one of the most important thing, in PHP we can declare a variable of any type, any where. 

PHP Variable Example 1:

$var="This is a string value";//declaration as string variable

echo "Value of \$var is: ".$var."<br/>";

$var=23232;//declaration as integer variable

echo "Value of \$var is: ".$var."<br/>";

$var=23.23;//declaration as float variable

echo "Value of \$var is: ".$var."<br/>";

$var=true;

echo "Value of \$var is: ".$var."<br/>";

$var='c';

echo "Value of \$var is: ".$var."<br/>";

Output:

Value of $var is: This is a string value
Value of $var is: 23232
Value of $var is: 23.23
Value of $var is: 1
Value of $var is: c

From the above example we can easily understand that the datatype of a variable is dynamic in nature. A variable is capable of storing any kind of value right from String, Integer, Float etc.

Sometimes we need to print Double quote, Single quote, Variable names as a statement, in this case we should use \ sign.

Example 2:

$var="Any Value";//declaration as string variable

echo "With '\' sign output is= \$var"."<br/>";

echo "Without '\' sign output is=$var"."<br/>";

echo"\"This text is within double quote\""."<br/>";

Output:

With '\' sign output is= $var
Without '\' sign output is= Any Value
"This text is within double quote"

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