PHP function constant()

Availability in versions: PHP 4.0.4

Parameters

Parameter	Data type	Default value	Note
$name	string	not	The constant name.

Return values

• int

  The filter() method must return one of three values upon completion.

  / public function filter($in, $out, &$consumed, $closing) { }

  /**

  • bool / public function onCreate() { }

  /**

  • string
  • mixed the value of the constant, or &null; if the constant is not defined.

  Other resources

  • https://www.php.net/manual/en/php-user-filter.filter.php
  • https://www.php.net/manual/en/php-user-filter.oncreate.php
  • https://www.php.net/manual/en/php-user-filter.onclose.php / public function onClose() { }

  }

  /** Instances of Directory are created by calling the dir() function, not by the new operator. / class Directory {

  /**

  • https://www.php.net/manual/en/directory.close.php / public function close ( $dir_handle ) {}

  /** Rewind directory handle. Same as rewinddir(), only dir_handle defaults to $this.

  • https://www.php.net/manual/en/directory.rewind.php / public function rewind ( $dir_handle ) {}

  /** Read entry from directory handle. Same as readdir(), only dir_handle defaults to $this.

  • https://www.php.net/manual/en/directory.read.php / public function read ( $dir_handle) { }

  }

  /** Returns the value of a constant

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  Odebírat

  Return Value	Meaning
  PSFS_PASS_ON	Filter processed successfully with data available in the out bucket brigade.
  PSFS_FEED_ME	Filter processed successfully, however no data was available to return. More data is required from the stream or prior filter.
  PSFS_ERR_FATAL (default)	The filter experienced an unrecoverable error and cannot continue.