Edit Report a Bug

    dBase Funcții

    Exemple

    Many examples in this reference require a dBase database. We will use /tmp/test.dbf that will be created in the example of dbase_create().

    Cuprins

    add a note add a note

    User Contributed Notes 2 notes

    up
    7
    bi.idan AT gmail.com
    17 years ago
    I know lots of you dosent really use dbase, but i've builded a class to help the one how dose.
    (sorry for bad english)

    - dbase.php

    <?php

    set_time_limit     (0);
    // site_path defined by parent
    require_once (SITE_PATH. '/server/php/libs/dbase/handler.php');

    /* DBase (dbf)
    *    manage dbf files, exports and search functionality
    *    with buildin optimizers for fast performance
    */

    class DBase
    {
        private     $handler = false;
        private     $searchopt = array (); // Search optimizer
       
            private function unload ()
        {
            if (    $this-> handler !== false)
                unset (    $this-> handler);
        }
       
        public function     __construct ($file = false)
        {
            if (    $file !== false)
                    $this-> load ($file);
        }
       
        public function     __destruct ()
        {
                $this-> unload ();
        }
       
        public function     load ($file)
        {
                $resource = dbase_open ($file, 0);
                $this-> handler = new DBase_Handler ($resource);
           
            return     $this-> handler;
        }
       
            /* Search
         *    search for string inside header
         *    returns record number
         *        false returned if not found or error occurred
         *    limit_results gets int or false, limit_results equels one will limit the
         *        search results for one result only, false for no limit
         */
            public function search ($headerText, $string, $limit_results = false, $handler = false)
        {
            if (    $handler === false)
                    $handler = $this-> handler;
               
            if (    $this-> searchopt [$headerText][$string])
                return     $this-> searchopt [$headerText][$string];
            else
            {
                    $size = $handler-> getSize ();
                if ( (     $headerNumber = $handler-> getHeaderNumber ($headerText) ) !== false)
                {
                        $results = array ();
                    for (    $i = 1; $i < $size; $i++)
                    {
                            $record = $handler-> getRecord ($i, false); // Disabled optimizer to prevent memory overflow
                            if (trim ($record [$headerNumber]) == $string)
                        {
                                $results[] = $i;
                           
                            if ( (    $limit_results !== false) && (sizeof ($results) == $limit_results) )
                                break;
                        }
                    }
                   
                    if (    sizeof ($results) > 0)
                    {
                            $this-> searchopt [$headerText][$string] = $results;
                        return     $this-> search ($headerText, $string, $handler);
                    }
                   
                    return     false;
                } else
                    return     false;
            }
        }
    }

    ?>

    - dbase_handler.php

    <?php

    /* DBase Handler (dbf)
    *    handles dbase resource
    */

    class DBase_Handler
    {
        private     $resource;
        private     $size; // Records Count
            private $header = array ();
        private     $dataopt = array (); // Data optimizer
       
            private function setHeader ()
        {
                $this-> header = dbase_get_header_info ($this-> resource);
        }
       
        public function     __construct ($resource)
        {
                $this-> resource = $resource;
                $this-> setHeader ();
                $this-> size = dbase_numrecords ($this-> resource);
        }
       
        public function     __destruct ()
        {
                dbase_close ($this-> resource);
        }
       
        public function     getRecord ($record_number, $dataopt = true)
        {
            if (    $record_number > $this-> size)
                return     false;
            else
            {
                if (    $this-> dataopt [$record_number])
                    return     $this-> dataopt [$record_number];
                else
                {
                        $record = dbase_get_record ($this-> resource, $record_number);
                    if (    $dataopt === true) // Data saving optimizer
                        {
                            $this-> dataopt [$record_number] = $record;
                        return     $this-> getRecord ($record_number);
                    } else
                        return     $record;
                }
            }
        }
       
        public function     getHeaderNumber ($headerText)
        {
            foreach (    $this-> header as $index => $header)
            {
                if (    $header ['name'] == $headerText)
                {
                    return     $index;
                    break;
                }
            }
           
            return     false;
        }
       
        public function     getHeader ($headerNumber)
        {
            if (    $headerNumber <= sizeof ($this-> header))
                return     $this-> header [$headerNumber];
            else
                return     false;
        }
       
        public function     getSize ()
        {
            return     $this-> size;
        }
    }

    ?>
    up
    -1
    bi.idan [at] gmail.com
    15 years ago
    some of you contacted me about memo fields and my script, so i'll just post my answers on the common question here.

    (note: this is not an adv for any program, only what i used for myself, and it's free)

    so, there are 2 options if you want to create/read memo fields:

    1. use a library for java/c++/c# to build a bridge between php and dbf file. i've used dbf2java. althougth it's not near complete as my other option, it's a good start. (http://code.google.com/p/dbf2java-library/)

    2. use an external program with pipes to grab the output. i used cdbflite, (http://www.whitetown.com/cdbflite/). it's free, and pretty much gives you everything you need to handle those dbf files. i'm not sure about big databases and it seems you need to register/buy it, but it's again, a start.

    hope it helps some of you who needs to handle those database files,

    Good luck,
    idan
    add a note add a note
    To Top