Concatenation of two strings in PHP

PHP offers different kinds of operators having distinctive functionalities. Operators enable us to perform arithmetic activities, string concatenation, compare values and to perform boolean operations, more...In this article, we will learn string operators given by PHP. Let's first learn the types of string operators in php. There are two string operators provided by PHP. 

 1.Concatenation Operator ("."): 

     This operator combines two string values and returns it as a new string.

 2.Concatenating Assignment operator (".="): 

     This operation attaches the argument on the right side to the argument on the left side.

 Let's demonstrate the utility of the above operators by following examples.

Example:

<?php
$a = 'Good';
$b = 'Morning';
$c = $a.$b;
echo " $c ";
?>

Output :

Goodmorning

Explanation:

Here we have taken two variables $a and $b s string. Then we have used the Concatenation operator(.) to concatenate those strings into a single string.

Example:

<?php
   $a = 'Hello';
   $b = [" Good morning"," Folks"];
   for($i = count($b)-1; $i >= 0;$i--) {
$a .= $b[$i];
}
echo " $a";
?>

Output:

Hello Folks Good morning

Explanation:

In this example, we have concatenated string values with array values with the help of the Concatenating Assignment operator (".="). $a represents a string while $b represents an array, we have concatenated string $a with the values of an array $b by using a for loop.

Note:

The Concatenation Operator ('.') has a similar priority as "+" and " -" operator, which can produce unexpected results.

Example:

<?php
$val = 5;
echo "Result: " . $val + 5;
?>

Output:

5

Explanation:

The above will print out "5" rather than "Result: 10" since first the string "Result5" is created and then it is added to 5 yielding 5 because the non-empty non-numeric string "Result5 " will be converted to 0 and add with 5 to yield 5. To print "Result: 10", use parentheses to change precedence:

<?php
$var = 5;
echo "Result: " . ($var + 5);
?>

Output:

Result:10

Alok Prasad

Updated on 30-Jul-2019 22:30:26

• Related Questions & Answers
• Concatenation of two strings in PHP program
• Concatenation of Strings in Java
• Smart concatenation of strings in JavaScript
• Concatenation of strings in Lua programming
• Check if concatenation of two strings is balanced or not in Python
• Concatenation of two String Tuples in Python
• Word formation using concatenation of two dictionary words in C++
• C++ program to get length of strings, perform concatenation and swap characters
• Twice join of two strings in JavaScript
• Largest Merge of Two Strings in C++
• Largest Merge of Two Strings in Python
• Finding gcd of two strings in JavaScript
• Return element-wise string concatenation for two arrays of string in Numpy
• Return a string which is the concatenation of the strings in the sequence in Numpy
• Comparing two strings in MySQL?