echo

(PHP 4, PHP 5)

echo — Output one or more strings

Description

void echo ( string $arg1 [, string $... ] )

Outputs all parameters.

echo() is not actually a function (it is a language construct), so you are not required to use parentheses with it. echo() (unlike some other language constructs) does not behave like a function, so it cannot always be used in the context of a function. Additionally, if you want to pass more than one parameter to echo(), the parameters must not be enclosed within parentheses.

echo() also has a shortcut syntax, where you can immediately follow the opening tag with an equals sign. This short syntax only works with the short_open_tag configuration setting enabled.


I have <?=$foo?> foo.

Parameters

arg1: The parameter to output.
...

Return Values

No value is returned.

Examples

Example #1 echo() examples


<?php

echo "Hello World";



echo "This spans

multiple lines. The newlines will be

output as well";



echo "This spans\nmultiple lines. The newlines will be\noutput as well.";



echo "Escaping characters is done \"Like this\".";



// You can use variables inside of an echo statement

$foo = "foobar";

$bar = "barbaz";



echo "foo is $foo"; // foo is foobar



// You can also use arrays

$baz = array("value" => "foo");



echo "this is {$baz['value']} !"; // this is foo !



// Using single quotes will print the variable name, not the value

echo 'foo is $foo'; // foo is $foo



// If you are not using any other characters, you can just echo variables

echo $foo;          // foobar

echo $foo,$bar;     // foobarbarbaz



// Some people prefer passing multiple parameters to echo over concatenation.

echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', chr(10);

echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "\n";



echo <<<END

This uses the "here document" syntax to output

multiple lines with $variable interpolation. Note

that the here document terminator must appear on a

line with just a semicolon. no extra whitespace!

END;



// Because echo does not behave like a function, the following code is invalid.

($some_var) ? echo 'true' : echo 'false';



// However, the following examples will work:

($some_var) ? print 'true' : print 'false'; // print is also a construct, but

                                            // it behaves like a function, so

                                            // it may be used in this context.

echo $some_var ? 'true': 'false'; // changing the statement around

?>

Notes

For a short discussion about the differences between print() and echo(), see this FAQTs Knowledge Base Article: » http://www.faqts.com/knowledge_base/view.phtml/aid/1/fid/40

Note: Because this is a language construct and not a function, it cannot be called using variable functions