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                                     echo

   (PHP 3, PHP 4 )
   echo -- Output one or more strings

Description

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

   Outputs all parameters.

   echo() is not actually a function (it is a language construct) so you
   are not required to use parentheses with it. In fact, if you want to
   pass more than one parameter to echo, you must not enclose the
   parameters within parentheses.

   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
   $bar = array("value" => "foo");
   echo "this is {$bar['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 $variable interpolation. Note
   that the here document terminator must appear on a
   line with just a semicolon. no extra whitespace!
   END;
   // Because echo is not a function, following code is invalid.
   ($some_var) ? echo 'true' : echo 'false';
   // However, the following examples will work:
   ($some_var) ? print('true'): print('false'); // print is a function
   echo $some_var ? 'true': 'false'; // changing the statement around
   ?>

   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.

   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

   See also print(), printf(), and flush().
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