PHP用记事本当数据库 (初学类,高手指点)

支持添加记录,删除记录,编辑记录,读取单条记录,读取全部记录,搜索记录(包括and 和 or),搜索时不支持and 和 or同时使用的....
初学php不久,请高手指点~~~

[code]<?php
class gettxt {
var $data="";
var $content="";
function add() {
$fo = fopen($this->data,"a+");
fwrite($fo,$this->content."\n");
fclose($fo);
} // end function add()

function del($id) {
$data = file_get_contents($this->data);
$fo = fopen($this->data,"w+");
$newdata="";
$lines = explode("\n",$data);
foreach( $lines as $line ){
if (!empty($line)) {
$tmp = explode("||",$line);
if($tmp[0] == $id) {

} else {
$newdata.=$line."\n";
}
}
}
fclose($fo);
$fo = fopen($this->data,"w+");
fwrite($fo,$newdata);
fclose($fo);
} // end function del()

function edit($id) {
$data = file_get_contents($this->data);
$fo = fopen($this->data,"w+");
$newdata="";
$lines = explode("\n",$data);
foreach( $lines as $line ){
if (!empty($line)) {
$tmp = explode("||",$line);
if($tmp[0] == $id) {
$newdata.=$this->content."\n";
} else {
$newdata.=$line."\n";
}
}
}
fclose($fo);
$fo = fopen($this->data,"w+");
fwrite($fo,$newdata);
fclose($fo);
} // end function edit()

function read($id="") {
$data = file_get_contents($this->data);
$lines = explode("\n",$data);
if (empty($id)) {
return $lines;
} else {
foreach( $lines as $line ){
$tmp = explode("||",$line);
if($tmp[0] == $id) {
return $line;
}
}
}
} // end function read()

function search1($where="") {
if (!is_array($where)) {
return $this->read();
} else {
$data = file_get_contents($this->data);
$lines = explode("\n",$data);
$tmpdata="";
foreach( $lines as $line ){
$tmp = explode("||",$line);
$tmpval_=1;
for ($i=0;$i<count($where);$i++) {
$tmpval = explode("#",$where[$i]);
if (count($tmpval)>1) {
$val1= $tmpval[0];
$val2= $tmpval[1];
if (!strpos(" ".$tmp[$val1],$val2)) {
$tmpval_=0;
break;
}
}
}
if ($tmpval_==1) {
$tmpdata.=$line."\n";
}
}
$tmpdata_=explode("\n",$tmpdata);
return $tmpdata_;
}
} // end function search1()

function search2($where="") {
if (!is_array($where)) {
return $this->read();
} else {
$data = file_get_contents($this->data);
$lines = explode("\n",$data);
$tmpdata="";
foreach( $lines as $line ){
$tmp = explode("||",$line);
$tmpval_=0;
for ($i=0;$i<count($where);$i++) {
$tmpval = explode("#",$where[$i]);
if (count($tmpval)>1) {
$val1= $tmpval[0];
$val2= $tmpval[1];
if (strpos(" ".$tmp[$val1],$val2)) {
$tmpval_=1;
break;
}
}
}
if ($tmpval_==1) {
$tmpdata.=$line."\n";
}
}
$tmpdata_=explode("\n",$tmpdata);
return $tmpdata_;
}
} // end function search2()
} // end class gettxt()


$gettxt=new gettxt();
$gettxt->data="data/data.txt";
//================添加
//$gettxt->content="19||title||posttime||<p>fsfdsfdsdjlkfdsjklfds</p>";
//$gettxt->add();
//================删除
//$gettxt->del(14);
//================编辑
//$gettxt->content="19||title11111||postti11111me1||<p>1fsfdsfds1111111djlkfdsjklfds</p>";
//$gettxt->edit(19);
//================读取单条记录
//$content=$gettxt->read(19);
//echo $content;
//================读取全部记录
//$content=$gettxt->read();
//foreach($content as $val) {
// echo $val."<br>";
//}
//================搜索记录
//搜索内容设置成一个数组,"字段的位置(从0开始)#搜索的内容"
//========多条件同时满足(AND)
//$s=array("2#1me1","3#sdj");
//$content=$gettxt->search1($s);
//foreach($content as $val) {
// echo $val."<br>";
//}
//=========多条件满足一个(OR)
//$s=array("2#pos1","2#1me1");
//$content=$gettxt->search2($s);
//foreach($content as $val) {
// echo $val."<br>";
//}
?>[/code]

数据库格式,ID推荐用时间戳....

嗯……就是拿txt存储数据……

不过这样写倒是比用数据库还麻烦了……

# $data = file_get_contents($this->data);
# $lines = explode("\n",$data);
# if (empty($id)) {
# return $lines;
# } else {
# foreach( $lines as $line ){
# $tmp = explode("||",$line);
# if($tmp[0] == $id) {
# return $line;
# }
# }
# }
# } // end function read()


上面的代码明显可以使用file函数来替代，不管怎样顶下

txt还是做做计数器什么小的程序好

txt在小型应用中还是挺方便的，不过不需要模仿数据库来用，
直接先把txt全部读入，要修改和删除时，直接操作数组，改动后存进入去就行了。这样更方便