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: neveropenfor string2: neveropen Output : neveropen
Code #1:
PHP
<?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
<?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
<?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
<?php // First String $a = 'Geeksfor' ; // Second String $b = "Geeks" ; // now $c contains "neveropen" $c = "$a{$b}" ; // Print The String $c echo " $c \n" ; ?> |
Output
neveropen
Time complexity : O(n)
Auxiliary Space : O(n)
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