In this blog, I am going to explain Variable Type & Type Conversion in PHP.
variable type depends on the value of currently holds means when you declare a variable in PHP, You do not declare its type.

$value = “This is Variable”; // assign string
echo $value;

you can change variable’s type by assigning a new value of different type.

$val = 44; // integer string
echo $val;

Automatic type conversion-

A variable type can depend upon the text in which it is used. Some functions and operators can be expect the value of a particular type convert automatically that type of its value.

	$val = array('first', 'second', 'third');
	echo "This is Automatic type conversion " . $val[0] . ' example <br>';
	echo "This is Automatic type conversion " . $val[1] . ' example<br>';
	echo "This is Automatic type conversion " . $val[2] . ' example<br>';
	// $var is set as an integer = 25
	$var = "10" + 15;
	// $var is set as a float = 25.0
	echo $var;
	$var = "10" + 15.0;
	// $var is set as a string = "15 Steps"
	echo $var;
	$var = 15 . " Steps";
	echo $var;

view raw automatic-type-conversion.php hosted with by GitHub

Output-

settype() – Change Variable’s Data Type-

The function settype($value, “Type”) can clearly set the type of variable to type where the type’s value may be array, string, boolean integer, object, null. then uses of settype($value “Type”).

	<?php
	$var = 2.23;
	echo $var; // Displays "2.23"
	echo gettype($var);
	echo '<br>';
	//prints double
	settype( $var, "string" );
	echo $var; // Displays "2.23"
	echo gettype($var);
	echo '<br>';
	//prints string
	settype( $var, "integer" );
	echo $var; // Displays "2"
	echo gettype($var);
	echo '<br>';
	//prints integer
	settype( $var, "float" );
	echo $var; // Displays "2"
	echo gettype($var);
	//prints double
	settype( $var, "boolean" );
	echo $var; // Displays "1"
	echo gettype($var);
	echo '<br>';
	//prints boolean
	settype( $var, "null" );
	echo $var; // Displays nothing
	echo gettype($var);
	//prints NULL
	?>

view raw settype-variable.php hosted with by GitHub

Output–

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Rajesh Kumar

I’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at I reviewed , and SEO strategies at Wizbrand. 

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