PHP function constant()

Availability in versions: PHP 4.0.4

Parameters

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

  

  Jan BarášekVíce o autorovi

  Autor článku pracuje jako seniorní vývojář a software architekt v Praze. Navrhuje a spravuje velké webové aplikace, které znáte a používáte. Od roku 2009 nabral bohaté zkušenosti, které tímto webem předává dál.

  Rád vám pomůžu:

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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.