PHP 5.6.22 is available

echo

(PHP 4, PHP 5)

echoOutput one or more strings

Opis

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. Prior to PHP 5.4.0, this short syntax only works with the short_open_tag configuration setting enabled.

I have <?=$foo?> foo.

Parametry

arg1

The parameter to output.

...

Zwracane wartości

Nie jest zwracana żadna wartość.

Przykłady

Przykład #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
?>

Notatki

Informacja: Ponieważ jest to element składni języka a nie funkcja, nie może być on wywoływany używając zmiennych funkcji

Zobacz też:

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User Contributed Notes 2 notes

up
0
Anonymous
9 days ago
You can write like this <?=$a,$b,$c?>, and it's equal to <?php echo $a, $b, $c; ?>.
up
-3
Maxim
5 months ago
I think it would be good to mention if "echo" prints trailing New Line character or not. It seems like it doesn't, but in many other languages echo adds new line.

Actually I opened this page to lookup this kind of information.
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