PHP Echo

When we want to display data on a web page, we need to use function echo ().

Let's say we need to display Hello Web ! on a web page, for that we need to put the string in quotes after operator echo.

<?php

   echo  'Hello Web !';

   //Output a string  Hello Web

?>

The echo () function is used to output the given argument. It can output all types of data, and multiple outputs can be made with only one echo () command.

The echo is not a function (it is a language construct), so you do not have to use brackets with it.

If you want to pass more than one parameter to echo, the parameters must not be enclosed within brackets.

For example.

<?php

   echo  'Hello Web !';

   //Output a string  Hello Web

   echo  ('Hello Web !');

   //Output a string  Hello Web 

   echo  $variable;

   //Output a value of $variable

   echo 'string ' . $variable. ' other string' ;
 
   //Output a string, then a variable, then a string

?>

For the output of data, we can use single and double-quotes.

If we use single quotes, the data date between the quotes always will be displayed as a string!

<?php

   $variable = 'Hello Web !' ;

   echo  '$variable';

   //Output a string  $variable

   echo  $variable;

   //Output a string  Hello Web

   // For the number, we can not use quotes

   echo '3' . "3" . 3;
   
  //Output 3  3  3
   

?>

Also, we can use function echo in formatting web pages.

<?php

   echo "<strong>This is bold text</strong>";

   echo "<i>This is italic  text</i>";

?>

// in output we get

This is bold text



This is italic  text

There is another function for text output print() .

Тhe difference between print() and echo().

• print() has returned value (1)
• we cant use multiple parameters for print()
• print() is processed slower than echo()

<?php

   print  'Hello';

   //Output a string  hello

   print  $variable;

   //Output a value of $variable

?>