发信人: bb_rain()
整理人: tang(2001-01-31 09:00:37), 站内信件
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<?
/*********************************************************************
*********
Data Module for PHP3 & PHP4 ( File, v 1.00 )
Copyright (C) 2000 heyin.com, All Rights Reserved.
http://www.heyin.com
Rain ( Email: [email protected] Oicq: 1235686 )
cl_datafile.php, 2000/8/26
**********************************************************************
*********/
// Data Module Class
class DataModule {
var $FILE_NAME;
var $FD_NAME;
var $handle;
var $IN;
var $SUB;
var $WHERE;
var $ORDER_BY;
var $ORDER;
var $LIMIT;
// Create Data Module
function Create($FileName) {
global $DATA_PATH;
$this->FILE_NAME = $DATA_PATH.$FileName;
}
// Set Value
function Set($varname, $value) {
$this->$varname = $value;
}
// open datafile
function Open($type="", $Op="") {
switch ($type) {
case "HEAD_FILE":
$this->handle=fopen($this->FILE_NAME.".000", $Op);
break;
case "DATA_FILE":
$this->handle=fopen($this->FILE_NAME.".dat", $Op);
break;
}
}
// close datafile
function Close($type="") {
if (!empty($type)) fclose($this->handle);
}
// Read Field Name
function FieldName() {
unset($this->FD_NAME); // Clear Field Name Array
$this->Open("HEAD_FILE","r");
$this->FD_NAME = fgetcsv($this->handle, 1000, ",");
$this->Close("HEAD_FILE");
$count=sizeof($this->FD_NAME);
return $count;
}
// Insert Data
function Add() {
$count = $this->FieldName();
for ($i=0; $i<$count; $i++) { $FD_VALUE[$i]="''"; }
while ( list($key, $val) = each($this->IN) ) {
for ($i=0; $i<$count; $i++) {
if ($this->FD_NAME[$i]==$key) $FD_VALUE[$i]="'".$val."'";
}
}
$VALUE_LIST = implode(',', $FD_VALUE);
$this->AutoSave($VALUE_LIST."\n", "a+");
}
// Update Data
function Edit() {
$count = $this->FieldName();
$this->Open("DATA_FILE", "r");
$this->Sub();
while ( $FD_VALUE = fgetcsv($this->handle, 100000, ",") ) {
$result = $this->WhereSub($FD_VALUE, $count);
if ($result) {
reset($this->IN);
while ( list($key, $val) = each($this->IN) ) {
for ($i=0; $i<$count; $i++) {
if ($this->FD_NAME[$i]==$key) $FD_VALUE[$i]="'".$val."'";
}
}
}
$VALUE_LIST = implode(',', $FD_VALUE);
$VALUE_LIST.= "\n";
$NEW.= $VALUE_LIST;
}
$this->Close("DATA_FILE");
$this->AutoSave($NEW, "w");
}
// Read Data
function Read() {
global $OUT,$COUNT,$LINES;
$count = $this->FieldName();
$this->Open("DATA_FILE", "r+");
$size=0;
$this->Sub();
while ( $FD_VALUE = fgetcsv($this->handle, 100000, ",") ) {
$result = $this->WhereSub($FD_VALUE, $count);
if ($result) {
for ($i=0;$i<$count;$i++) {
$LINES[$size][$this->FD_NAME[$i]] = str_replace("'", "", $FD
_VALUE[$i]);
// Return LINES
}
$size++;
}
}
$COUNT = $size-1; // Return $COUNT
$OUT = $LINES[0]; // Return $OUT
$this->Close("DATA_FILE");
}
// Delete Data
function Del() {
$count = $this->FieldName();
$this->Open("DATA_FILE", "r");
$this->Sub();
while ( $FD_VALUE = fgetcsv($this->handle, 100000, ",") ) {
$result = $this->WhereSub($FD_VALUE, $count);
if (!$result) {
$VALUE_LIST = implode(',', $FD_VALUE);
$VALUE_LIST.= "\n";
$NEW.= $VALUE_LIST;
}
}
$this->Close("DATA_FILE");
$this->AutoSave($NEW, "w");
}
// Return $TOTAL
function Total() {
global $TOTAL;
$count = $this->FieldName();
$this->Open("DATA_FILE", "r+");
$size=0;
$this->Sub();
while ( $FD_VALUE = fgetcsv($this->handle, 100000, ",") ) {
$result = $this->WhereSub($FD_VALUE, $count);
if ($result) $size++;
}
$TOTAL = $size-1;
$this->Close("DATA_FILE");
}
// Sub Parse
function Sub() {
$S = $this->SUB;
$S = str_replace("=", "==", $S);
$S = str_replace(">==", ">=", $S);
$S = str_replace("<==", "<=", $S);
$S = str_replace("WHERE", "|", $S);
$S = str_replace("ORDER BY", "|", $S);
$S = str_replace("LIMIT", "|", $S);
$SUB = explode("|", $S);
$this->WHERE = $SUB[1];
$var = explode(' ', $SUB[2]);
$this->ORDER_BY = $var[0];
$this->ORDER = $var[1];
$this->LIMIT = str_replace(" ", "", $SUB[3]);
unset($this->SUB); // Clear Sub
}
// Return Where
function WhereSub($Fields,$Count) {
$S = $this->WHERE;
for ($i=0; $i<$Count; $i++) {
$S = str_replace($this->FD_NAME[$i], $Fields[$i], $S);
}
eval("\$RESULT = $S;");
return $RESULT;
}
// Auto Save
function AutoSave($Data, $Op) {
$this->Open("DATA_FILE", $Op);
flock($this->handle, 2);
fwrite($this->handle, $Data);
$this->Close("DATA_FILE");
}
}
?>
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