There are two string operators. The first is the concatenation operator (‘.‘), which returns the concatenation of its right and left arguments. The second is the concatenating assignment operator (‘.=‘), which appends the argument on the right side to the argument on the left side.
Examples :
Input : string1: Hello string2 : World! Output : HelloWorld! Input : string1: geeksfor string2: geeks Output : geeksforgeeks
Code #1:
<?php // First String $a = 'Hello' ;
// Second String $b = 'World!' ;
// Concatenation Of String $c = $a . $b ;
// print Concatenate String echo " $c \n" ;
?> |
HelloWorld!
Time complexity : O(n)
Auxiliary Space : O(n)
Code #2 :
<?php // First String $fname = 'John' ;
// Second String $lname = 'Carter!' ;
// Concatenation Of String $c = $fname . " " . $lname ;
// print Concatenate String echo " $c \n" ;
?> |
John Carter!
Time complexity : O(n)
Auxiliary Space : O(n)
Code #3 :
<?php // First String $a = 'Hello' ;
// now $a contains "HelloWorld!" $a .= " World!" ;
// Print The String $a echo " $a \n" ;
?> |
Hello World!
Time complexity : O(n)
Auxiliary Space : O(n)
Code #4 :
<?php // First String $a = 'Geeksfor' ;
// Second String $b = "Geeks" ;
// now $c contains "GeeksforGeeks" $c = "$a{$b}" ;
// Print The String $c echo " $c \n" ;
?> |
Output
GeeksforGeeks
Time complexity : O(n)
Auxiliary Space : O(n)
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