When we want to display data on a web page, we need to use function echo ().
Let's say we need to display Hello W3docs ! on a web page, for that we need to put string in quotes after operator echo .
echo 'Hello W3docs !'; //Output a string Hello W3docs
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.
Actually echo is not a function (it is a language construct), so you are 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.
echo 'Hello W3docs !'; //Output a string Hello W3docs echo ('Hello W3docs !'); //Output a string Hello W3docs echo $variable; //Output a value of $variable echo 'string ' . $variable. ' other string' ; //Output a string, then a variable, then a string
For output of data we can use single and double quotes.
If we use single quotes, data date between the quotes always will be displayed as string !
'Hello W3docs' ; echo '$variable'; //Output a string $variable echo $variable; //Output a string Hello W3docs // For the number we can not use quotes echo '3' . "3" . 3; //Output 3 3 3$variable =
Also we can use function echo in formatting web pages.
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()
print 'Hello'; //Output a string hello print $variable; //Output a value of $variable