in_array(3) [php man page]

IN_ARRAY(3)								 1							       IN_ARRAY(3)

in_array - Checks if a value exists in an array

SYNOPSIS

       bool in_array FALSE (mixed  $needle, array  $haystack, [bool  $strict])

DESCRIPTION

	Searches $haystack for $needle using loose comparison unless $strict is set.

PARAMETERS

	      o $needle
		- The searched value.

	      Note

		      If $needle is a string, the comparison is done in a case-sensitive manner.

	      o $haystack
		- The array.

	      o $strict
		-  If  the  third  parameter  $strict is set to TRUE then the in_array(3) function will also check the types of the $needle in the
		$haystack.

RETURN VALUES

	Returns TRUE if $needle is found in the array, FALSE otherwise.

EXAMPLES

       Example #1

	      in_array(3) example

	      <?php
	      $os = array("Mac", "NT", "Irix", "Linux");
	      if (in_array("Irix", $os)) {
		  echo "Got Irix";
	      }
	      if (in_array("mac", $os)) {
		  echo "Got mac";
	      }
	      ?>

	       The second condition fails because in_array(3) is case-sensitive, so the program above will display:

	      Got Irix

       Example #2

	      in_array(3) with strict example

	      <?php
	      $a = array('1.10', 12.4, 1.13);

	      if (in_array('12.4', $a, true)) {
		  echo "'12.4' found with strict check
";
	      }

	      if (in_array(1.13, $a, true)) {
		  echo "1.13 found with strict check
";
	      }
	      ?>

	      The above example will output:

	      1.13 found with strict check

       Example #3

	      in_array(3) with an array as needle

	      <?php
	      $a = array(array('p', 'h'), array('p', 'r'), 'o');

	      if (in_array(array('p', 'h'), $a)) {
		  echo "'ph' was found
";
	      }

	      if (in_array(array('f', 'i'), $a)) {
		  echo "'fi' was found
";
	      }

	      if (in_array('o', $a)) {
		  echo "'o' was found
";
	      }
	      ?>

	      The above example will output:

		'o' was found

SEE ALSO

       array_search(3), isset(3), array_key_exists(3).

PHP Documentation Group 													       IN_ARRAY(3)

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READLINE_CALLBACK_HANDLER_INSTALL(3)					 1				      READLINE_CALLBACK_HANDLER_INSTALL(3)

readline_callback_handler_install - Initializes the readline callback interface and terminal, prints the prompt and returns immediately

SYNOPSIS

       bool readline_callback_handler_install (string  $prompt, callable  $callback)

DESCRIPTION

	Sets up a readline callback interface then prints $prompt and immediately returns. Calling this function twice without removing the previ-
       ous callback interface will automatically and conveniently overwrite the old interface.

	The callback feature is useful when combined with stream_select(3) as it allows interleaving of IO and user input, unlike readline(3).

PARAMETERS

	      o $prompt
		- The prompt message.

	      o $callback
		- The $callback function takes one parameter; the user input returned.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

       Example #1

	      Readline Callback Interface Example

	      <?php
	      function rl_callback($ret)
	      {
		  global $c, $prompting;

		  echo "You entered: $ret
";
		  $c++;

		  if ($c > 10) {
		      $prompting = false;
		      readline_callback_handler_remove();
		  } else {
		      readline_callback_handler_install("[$c] Enter something: ", 'rl_callback');
		  }
	      }

	      $c = 1;
	      $prompting = true;

	      readline_callback_handler_install("[$c] Enter something: ", 'rl_callback');

	      while ($prompting) {
		  $w = NULL;
		  $e = NULL;
		  $n = stream_select($r = array(STDIN), $w, $e, null);
		  if ($n && in_array(STDIN, $r)) {
		      // read a character, will call the callback when a newline is entered
		      readline_callback_read_char();
		  }
	      }

	      echo "Prompting disabled. All done.
";
	      ?>

       readline_callback_handler_remove(3), readline_callback_read_char(3), stream_select(3).

PHP Documentation Group 										      READLINE_CALLBACK_HANDLER_INSTALL(3)

Linux and UNIX Man Pages

in_array(3) [php man page]

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