Descriere

echo(string ...$expressions): void

Scrie una sau mai multe expresii, fara alte linii noi sau spatii aditionale.

echo nu este o functie dar este un constructor.

Argumentele sale sunt o lista de expresii aflate dupa cuvantul cheie echo, separate de punct ., si nedelimintate de paranteze.

Spre deosebire de alte limbaje constructorul,echo nu returneaza nici un fel de valoare, deci nu poate fi folosita in cadrul unei expresii.

<?=$expresie?>

echo are o sintaxa scurta, in care poti scrie imediat dupa tagul de deschidere urmat de semnul egal <?=. Aceasta sintaxa este valida chiar daca configurarea short_open_tag e dezactivata.

Diferenta majora fata de print este ca accepta mai multe argumente si nu returneaza nici o valoare.

Parametrii

• expressions

  Una sau mai multe expresii de tip string separate de . vor fi scrise. Valorile care nu sunt string vor fi automat convertite, chiar si cand directiva strict_types e activa.

Exemple

		

echo "echo does not require parentheses.";

// Strings can either be passed individually as multiple arguments or
// concatenated together and passed as a single argument
echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', "\n";
echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "\n";

// No newline or space is added; the below outputs "helloworld" all on one line
echo "hello";
echo "world";

// Same as above
echo "hello", "world";

echo "This string spans
multiple lines. The newlines will be
output as well";

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

// The argument can be any expression which produces a string
$foo = "example";
echo "foo is $foo"; // foo is example

$fruits = ["lemon", "orange", "banana"];
echo implode(" and ", $fruits); // lemon and orange and banana

// Non-string expressions are coerced to string, even if declare(strict_types=1) is used
echo 6 * 7; // 42

// Because echo does not behave as an expression, 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 is a valid expression, returning 1,
			// so it may be used in this context.

echo $some_var ? 'true': 'false'; // evaluating the expression first and passing it to echo