runkit_method_redefine(3) [php man page]

RUNKIT_METHOD_REDEFINE(3)						 1						 RUNKIT_METHOD_REDEFINE(3)

runkit_method_redefine - Dynamically changes the code of the given method

SYNOPSIS

       bool runkit_method_redefine (string  $classname, string	$methodname, string  $args, string  $code, [int  $flags = RUNKIT_ACC_PUBLIC])

DESCRIPTION

       Note

	      This function cannot be used to manipulate the currently running (or chained) method.

       Warning

	      This  function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in
	      a future release of PHP. This function should be used at your own risk.

PARAMETERS

	      o $classname
		- The class in which to redefine the method

	      o $methodname
		- The name of the method to redefine

	      o $args
		- Comma-delimited list of arguments for the redefined method

	      o $code
		- The new code to be evaluated when $methodname is called

	      o $flags
		- The redefined method can be RUNKIT_ACC_PUBLIC, RUNKIT_ACC_PROTECTED or RUNKIT_ACC_PRIVATE

	      Note

		      This parameter is only used as of PHP 5, because, prior to this, all methods were public.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      runkit_method_redefine(3) example

	      <?php
	      class Example {
		  function foo() {
		      return "foo!
";
		  }
	      }

	      // create an Example object
	      $e = new Example();

	      // output Example::foo() (before redefine)
	      echo "Before: " . $e->foo();

	      // Redefine the 'foo' method
	      runkit_method_redefine(
		  'Example',
		  'foo',
		  '',
		  'return "bar!
";',
		  RUNKIT_ACC_PUBLIC
	      );

	      // output Example::foo() (after redefine)
	      echo "After: " . $e->foo();
	      ?>

	      The above example will output:

	      Before: foo!
	      After: bar!

SEE ALSO

       runkit_method_add(3), runkit_method_copy(3), runkit_method_remove(3), runkit_method_rename(3), runkit_function_redefine(3).

PHP Documentation Group 												 RUNKIT_METHOD_REDEFINE(3)

ECHO(3) 								 1								   ECHO(3)

echo - Output one or more strings

SYNOPSIS

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

DESCRIPTION

	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 syn-
       tax only works with the short_open_tag configuration setting enabled.

       I have <?=$foo?> foo.

PARAMETERS

	      o $arg1
		- The parameter to output.

	      o $...
		-

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
multiple lines. The newlines will be
output 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.' . "
";

	      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

       Note

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

SEE ALSO

       print(3), printf(3), flush(3), Heredoc syntax.

PHP Documentation Group 														   ECHO(3)