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<?php
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/*
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* Wrapper for file functions. Ensures the path to the file is available
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* then opens the file (default append/binary mode) and grabs an
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* exclusive lock
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*/
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class File {
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// fully qualified path and file name
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protected $fullFileName;
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// file name
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protected $filename;
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// path to file
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protected $path;
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// permissions to assign to path
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protected $pathPermission = 0777;
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// mode to open in. Default is append in binary mode
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public $filemode = 'ab';
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// file handle
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protected $fh = null;
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/*
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* constructor must have file name, all else is default
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* however filename may be empty or null
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*/
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public function __construct( $filename = null, $filemode = null ) {
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//if ( $filemode !== null ) $this->filemode = $filemode;
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if ( isset( $filename ) && $filename ) {
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$temp = pathinfo( $filename );
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$this->filename = $temp['basename'];
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$this->path = $temp['dirname'];
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$this->fullFileName = $this->path . '/' . $this->filename;
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$this->makePath(); // will return false if we could not create the path
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}
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$this->openFile();
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} // __construct
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public function openFile() {
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if ( ! isset( $fh ) && isset( $this->fullFileName ) ) {
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$this->fh = fopen( $this->fullFileName, $this->filemode );
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/*if ( $this->fh === false )
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die( "could not write to $this->fullFileName" );
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// get exclusive lock during script life.
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if ( ! flock( $this->fh, LOCK_EX ) )
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die( "could not acquire lock on $this->fullFileName" );
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*/
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}
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}
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public function closeFile () {
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if ( isset( $this->fp) ) fclose( $this->fp );
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}
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/*
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* creates path $path if it does not exist
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* sets permissions to $pathPermission
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* Note: this does a recursive creation (mkdir -p) but does not
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* check permissions on existing directories
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* returns true on success, false on failure
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*/
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private function makePath() {
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/* we'll return true if the path exists. HOWEVER, note that
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* we do not check permissions, so this could cause issues
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*/
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if ( is_dir( $this->path ) )
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return true;
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/* path does not exist. Save the current umask and set it
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* temporarily to 0, then create the directory and restore
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* umask
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*/
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$oldmask = umask(0); // set umask to 0 temporarily
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$result = mkdir( $this->path, $this->pathPermission, true ); // recursively build tree
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umask( $oldmask ); // restore umask
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return $result;
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} // makePath
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} // class file
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?>
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