1 <?

     2 interface AdressBook_Interface {

     3     public function get_entries();

     4     public function search_entries($pattern);

     5     public function add_entry($entry);

     6 }

     7 

     8 class AddressBook implements AdressBook_Interface {

     9 

    10     const RS = "\n";

    11     const FS = "\t";

    12 

    13     private $fh;

    14     private $file;

    15 

    16     function __construct($file) {

    17 	@mkdir(dirname($file));

    18 	$this->fh = fopen($file, "a+b");

    19 	flock($this->fh, LOCK_EX);

    20 	$stat = fstat($this->fh);

    21 	if ($stat['size'] == 0) {

    22 		fputs($this->fh, join(self::FS, array("Hans Hanson", "0815", "hans@hanson.de"))

    23 			. self::RS);

    24 	}

    25 	flock($this->fh, LOCK_SH);

    26 	fseek($this->fh, 0, SEEK_SET);

    27     }

    28 

    29     function get_entries() {

    30 	$entries = array();

    31 	fseek($this->fh, 0, SEEK_SET);

    32 	while($line = stream_get_line($this->fh, 0, self::RS)) {

    33 		if ($line === FALSE) break;

    34 		$entries[] = explode(self::FS, $line);

    35 	}

    36 	return $entries;

    37     }

    38 

    39     function add_entry($entry) {

    40 	$fields = array('name', 'tel', 'mail');

    41 

    42 	$new = array();

    43 	foreach($fields as $key) {

    44 		if (!isset($entry[$key])) return false;

    45 		$new[$key] = trim($entry[$key]);

    46 		$new[$key] = preg_replace('/['.self::RS.self::FS.' ]+/', ' ', $new[$key]);

    47 		if (empty($new[$key])) return false;

    48 	}

    49 

    50 	flock($this->fh, LOCK_EX);

    51 	fputs($this->fh, join(self::FS, $new) . self::RS);

    52 	flock($this->fh, LOCK_UN);

    53 

    54 	return true;

    55     }

    56 

    57     function search_entries($pattern) {

    58 	$pattern = trim($pattern);

    59 	if (empty($pattern)) return;

    60 	$pattern = preg_replace('/\//', '\/', $pattern);

    61 	fseek($this->fh, 0, SEEK_SET);

    62 	$entries = array();

    63 	while ($line = stream_get_line($this->fh, 0, self::RS)) {

    64 		if ($line === FALSE) break;

    65 		if (!preg_match("/$pattern/i", $line)) continue;

    66 		$entry = explode(self::FS, $line);

    67 		$entries[] = array('name' => $entry[0],

    68 			           'tel' => $entry[1],

    69 				   'mail' => $entry[2]);

    70 	}

    71 	return $entries;

    72     }

    73 }

    74 

    75 ?>