How to convert an Integer Into a String in PHP ?
The PHP strval() function is used to convert an Integer Into a String in PHP. There are many other methods to convert an integer into a string.
In this article, we will learn many methods.
Methods:
Table of Content
- Using strval() function.
- Using Inline variable parsing.
- Using Explicit Casting.
- Using sprintf() Function
- Using concatenation with an Empty String
Using strval() function.
Note: The strval() function is an inbuilt function in PHP and is used to convert any scalar value (string, integer, or double) to a string. We cannot use strval() on arrays or on object, if applied then this function only returns the type name of the value being converted.
Syntax:
strval( $variable )
Return value: This function returns a string. This string is generated by typecasting the value of the variable passed to it as a parameter.
Example:
<?php
$var_name = 2;
// converts integer into string
$str = strval($var_name);
// prints the value of above variable as a string
echo "Welcome $str w3wiki";
?>
Output
Welcome 2 w3wiki
Using Inline variable parsing.
Note: When you use Integer inside a string, then the Integer is first converted into a string and then prints as a string.
Syntax:
$integer = 2;
echo "$integer";
Example:
<?php
$var_name = 2;
// prints the value of above variable
// as a string
echo "Welcome $var_name w3wiki";
?>
Output
Welcome 2 w3wiki
Using Explicit Casting.
Note: Explicit Casting is the explicit conversion of data type because the user explicitly defines the data type in which he wants to cast. We will convert Integer into String.
Syntax:
$str = (string)$var_name
Example:
<?php
$var_name = 2;
//Typecasting Integer into string
$str = (string)$var_name;
// prints the value of above variable as a string
echo "Welcome $str w3wiki";
?>
Output
Welcome 2 w3wiki
Using sprintf() Function
The sprintf() function writes a formatted string to a variable.
Syntax:
$str = sprintf("%d", $var_name);
Example:
<?php
$var_name = 2;
// Using sprintf to convert integer to string
$str = sprintf("%d", $var_name);
// Prints the value of above variable as a string
echo "Welcome $str w3wiki";
?>
Output:
Welcome 2 w3wiki
Using concatenation with an Empty String
Concatenating an integer with an empty string in PHP converts the integer to a string. This approach leverages the automatic type conversion in PHP, making it simple and intuitive. For example, `$string = $integer . “”;` effectively turns `$integer` into a string.
Example:
<?php
$integer = 123;
$string = $integer . "";
echo $string; // Outputs: 123
?>
Output
123