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PHP Variable substitution in String


PHP Variable substitution in String


In PHP we can write variable name into a long string and PHP knows how to replace the variable with its value.


	      		<?php
				    $name = "studentsempire.com";
				    print "Your name is $name\n";
				    $name2 = $name;
				    print 'Goodbye, $name2!\n';
				?>
	      

output


	      		Your name is studentsempire.com
Goodbye, $name2!\n	      

Example


	      		<?php
					$website = "studentsempire"; 
					echo "Welcome to $website";   
				?>
	      

output


	      		Welcome to studentsempire	      

We confused PHP if $myValues is a variable name or it is a plural form of a variable.


To get around this problem using curly brackets, as follows:


	      		<?php
				    $website = "studentsempire"; 
					echo "welcome to {$website}";  
				?>
	      

output


	      		welcome to studentsempire	      

You can also place the opening curly bracket after the $ symbol, which has the same effect:


	      		<?php
				    $website = "studentsempire"; 
					echo "welcome to ${website}";  
				?>
	      

output


	      		welcome to studentsempire	      

We can use the curly brackets to distinguish the variable name from the rest of the string.


Curly bracket syntax can insert more complex variable values, such as array element values and object properties.


Just make sure the whole expression is surrounded by curly brackets:


	      		<?php
				    $myArray["age"] = 14; 
					echo "My age is {$myArray["age"]}"; // Displays "My age is 14"  
				?>
	      

output


	      		My age is 14	      




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