ajax php 聊天室实例代码(3) if (! $s ) die ( "no content!!" ); $fp = @ fopen ( $filename , "a+" ); if (! $fp ) die ( "repeat" ); $re_time = 0; while (!@ flock ( $fp , lock_ex)) { sleep(1); $re_time ++; if ( $re_time >=4) break ; } if ( $re_time <4) { @ fputs ( $fp , $s ); @ flock ( $fp , lock_un); } else die ( "repeat" ); @fclose( $fp ); echo "ok" ; } else if ( $action == "read" ) { $first = $_post [ "first" ]; $lastmod = intval ( $_post [ "lastmod" ]) - $get_past_sec ; //得到两秒以内的所有发言， $alastmod = @ filemtime ( $filename ); if ( $lastmod - $alastmod > 360*48) die ; $name = $_post [ 'name' ]; $name = str_replace ( "n" , "" , $name ); $ip = get_ip(); $json = array (); $json [ "lastmod" ] = time(); $item = array (); $newonline = array (); $offline = array (); $fp = @ fopen ( $filename , 'r' ); flock ( $fp ,lock_ex); $s = fread ( $fp , filesize ( $filename )); flock ( $fp ,lock_un); fclose( $fp ); $lines = explode ( "n" , $s ); if ( $alastmod >= $lastmod && ! $first ) { foreach ( $lines as $l ) { $item2 = array (); $l = str_replace ( array ( "n" , "r" ), "" , $l ); if ( strpos ( $l , "|" ) === false) continue ; $arr = explode ( "|" , $l ); $t = intval ( $arr [0]); if ( $t >= $lastmod ) { $item2 [ "time" ] = date ( "h:i:s" , $t ); $item2 [ "word" ] = addslashes ( $arr [1]); $item [] = $item2 ; } } } else if ( $first ) { $item = array (); $total = count ( $lines ); for ( $i = $total -1; $i >= $total - $least ; $i --) { if ( $i <=0) break ; $item2 = array (); $l = str_replace ( array ( "n" , "r" ), "" , $lines [ $i ]); if ( strpos ( $l , "|" ) === false) continue ; $arr = explode ( "|" , $l ); $t = intval ( $arr [0]); $item2 [ "time" ] = ( date ( "m-d" ,time()) == date ( "m-d" , $t ))? date ( "h:i:s" , $t ): date ( "m-d h:i" , $t ); $item2 [ "word" ] = addslashes ( $arr [1]); $item [] = $item2 ; } $item = array_reverse ( $item ); } $s = "" ; $nt = time(); $onlines = array (); if ( $disonline && $touchme ) { $users = @file( $datafile ); foreach ( $users as $l ) { $l = str_replace ( array ( "r" , "n" ), "" , $l ); if ( strpos ( $l , "|" ) === false) { $s .= $l . "n" ; continue ; } $arr = explode ( "|" , $l ); if ( $nt - intval ( $arr [1]) < $touchs *3) { if (trim( $name ) == trim( $arr [2])) { $s .= $arr [0]. "|" .time(). "|" . $name . "|" .get_ip(). "|n" ; } else $s .= $l . "n" ; $onlines [] = htmlspecialchars( $arr [2]); } } @ file_put_contents ( $datafile , $s ); $json [ "onlines" ] = $onlines ; } $json [ "lines" ] = $item ; echo array2json( $json ); } else if ( $action == "keep" ) { keeponline(); echo "keep ok" ; } else if ( $action == "quit" ) { $name = $_post [ 'name' ]; if ( $disonline ) { $users = @file( $datafile ); foreach ( $users as $l ) { $l = str_replace ( array ( "r" , "n" ), "" , $l ); if ( strpos ( $l , "|" ) === false) { $s .= $l . "n" ; continue ; } $arr = explode ( "|" , $l ); if (trim( $name ) == trim( $arr [2])) continue ; else $s .= $l . "n" ; } @ file_put_contents ( $datafile , $s ); echo "ok" ; } die (); } else { ?>
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