php 常用函数

Posted 2020-09-17 撒哈拉的雪

 

die(‘‘) 终止当前php文件的执行,并且向客户端输出一个终止原因说明[email protected] 压制住当前行代码警告消息.
time() 返回当前系统时间，以秒为消息的整数

$id = mysqli_insert_id($conn);返回连接上刚刚执行insert语句产生自增编号.
$size = mysqli_affected_rows($conn);返回连接上刚执行增删改语句影响行数
mysqli_fetch_all($result,MYSQLI_ASSOC);从查询结果集中抓取所有记录，并且返回二维数组.

例子：

<?php
//echo "1<br/>";
//die(‘当前程序出现故障‘);  //终止当前php运行
//echo "2<br/>";
//@$id = $_REQUEST[‘nid‘];
//echo $id;
$conn =    mysqli_connect(‘127.0.0.1‘,‘root‘,‘‘,‘bbs‘);
$sql = "INSERT INTO user VALUES(null,‘a‘,‘a‘,‘1.jpg‘,0,now())";
$result = mysqli_query($conn,$sql);
if($result===true){
    $id = mysqli_insert_id($conn);
    echo ‘新增记录编号是‘.$id.‘<br />‘;
    $size = mysqli_affected_rows($conn);
    echo ‘影响记录数‘.$size;
}

$sql = "SELECT * FROM user";
$result = mysqli_query($conn,$sql);
$rows = mysqli_fetch_all($result,MYSQLI_ASSOC);
echo "<hr/>";
foreach($rows as $k=>$v){
    //echo $k.‘<br />‘;
    echo $v[‘uid‘].$v[‘uname‘].$v[‘pic‘].‘<br />‘;
}
?>