php代码问题

这是一个源码 自己分析一下

<?php

include("conn.php")

$page_size=2

$url=$_SERVER["REQUEST_URL"]

$url=parse_url($url)

$url=$url[path]

$numq=mysql_query("SELECT * FROM `page`")

$num=mysql_num_rows($numq)//echo $num14

$page_first=1

$page_last=ceil($num/$page_size)

if ($_GET[page]>=1){

$page_num=$_GET[page]

$page_nums=($page_num-1)*$page_size

}else{

$page_num=1

$page_nums=($page_num-1)*$page_size

}

/***********************************head**************************************************/

echo "共".$num."条记录,共".$page_last."页"."<br>"

if($page_num>1){

echo "<a href=$url?page=".$page_first.">首页</a>" .

"<a href=$url?page=".($page_num-1).">上一页</a>"

}

/*************************************************************************************/

if($page_last<=5){

for($i=1$i<=$page_last$i++){

echo "<a href=$url?page=".$i.">"."第".$i."页| "."</a>"

}

}else if(($page_num+5-1)<=$page_last){

for($i=1$i<=5$i++){

echo "<a href=$url2?page=".($page_num+$i-1).">"."第".($page_num+$i-1)."页>>"."</a>"

}

}else{

for($i=$page_num$i<=$page_last$i++){

echo "<a href=$url2?page=".$i.">"."第".$i."页>>"."</a>"

}

}

/*************************************************************************************/

if($page_num<$page_last){

echo "<a href=$url?page=".($page_num+1).">下一页</a>".

"<a href=$url?page=".$page_last.">尾页</a>"

}

/*************************************************************************************/

$sql="SELECT * FROM `page` limit $page_nums,$page_size"

$query=mysql_query($sql)

echo "<table border=1><tr bgcolor=\"#336633\"><th>姓名</th><th>姓别</th></tr>"

while($row=mysql_fetch_array($query)){//echo $rowArray /echo $row[1]张1张2张3

echo "<tr ><td>"

echo $row[name]

echo "</td>"

echo "<td>"

echo $row[sex]

echo "</td></tr>"

}

echo "</table>"

echo "<br>"

echo "共".$num."条记录！".

"<a href=$url?page=".$page_first.">首页</a>" .

"<a href=$url?page=".($page_num-1).">上一页</a>" .

"<a href=$url?page=".($page_num+1).">下一页</a>".

"<a href=$url?page=".$page_last.">尾页</a>"

echo"<script language=\"javascript\">

function go(){

window.location.href=se.value

}

</script>"

echo "<select onchange=\"go()\" name=\"se\">"

for ($k=1$k<=$page_last$k++){

echo "<option value=".$url."?page="."$k>".$k."</option>"

}

echo "</select>"

?>

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