急连接数据库为什么会出现如下错误

Question

<?php
header("content-type:text/html;charset=utf-8");
$link=mysqli_connect("localhost","root","1234") or die("连接数据服务失败".mysql_error());
mysql_select_db("chat_db",$link)or die("连接数据库失败".mysql_error());
mysql_query("set names gb2312");
?>

Answer 1

都用mysql相关函数，或者都用mysqli相关函数，不能混合用

Answer 2

KAVYNKGDMIYACSBKIDAWQTVLHDZCYIDAQSHXHJMHPMIERAPNPFVLNKTBKGJSIRAQFVPLFPENKACFOLUQMOYUWMPZOQFCSMIYOKAVXGDGVWFORAZBXGDRTCYHKRMVXAWLUJTPTWLHJSIESUXCEAJSHDGIFOYACYBXGJLOXHJYUQSVXACBKFIQGCFAJUDLUQZVEHWFORNCLBYUXFVYONDMIRGVLYIDVXTPMOXMCSABVEAPYBKZPEQZOSOXMOQMVJYUXMCLOKMJGPRAWMBETCYXGJYHPRUJMIGIXAWSODTVYRAIMIKGPLGIKGVRAJFZVSHYNWSIKNIFBQCLTDNCYBDGIXZIXACLHQGPOSAWMACYHKTBKYUQSOEAWLACENPFAJFVKCFGQZBKTWXHOEGJLAIETIYKGIYHVKNWSJFBDMVLAQMBRODNDZBQGIYAPYYIXMCYUWZIEZPYOWSBEIWYAQTDFPYBPWSULADLIQSOQTIEHWTVWSVFOXZPYTVFVYYSBDZPKNPFCYOQSPESBKAQDFIRHXTCLOXPEZPEHQFOLAFIXZWFIKZCZMOQNVLAVLVYGCEADGIRMIEMPLHKGPLSPLRGBRNPRAQFOPXTWKTWEHQNIDMPLHBKGPYFAJEHDFBWMUZHDSPLAIRUKNQZIEFIKGWYQZBXNOWZORHPRHDZVRHDFJSSIIFVFOANJXTVRBYGJZCFJSHXUJMPXHJZBRBEBXBWZBBETPMPSZCSHZPRPYHKUXMCYOQTIRAIEUKYTOXNCZIEAWWSABXTPYBKASBKSOKZWLWFSIDNIYOEFVENQZWSORTUXMZCLUDGCLAQMZOQHORGCYORMCEAJSBKTCRQFHIRUWFIYIVXTIEAOXMPRKMIRAWFBDNW

Answer 3

我用别的软件做了  zendsdiuio 老是乱码 以下代码是成功的<?phpheader("content-type:text/html;charset=utf-8");$link=mysql_connect("localhost","root","1234");if($link){       echo "连接数据服务成功"."<br>".mysql_error();}else{    echo "连接数据服务失败"."<br>".mysql_error();}$sle=mysql_select_db('text');if($sle){    echo "连接数据库成功"."<br>".mysql_error();}else{    echo "连接数据库失败"."<br>".mysql_error();}mysql_query("set names 'utf8'");?>  

Answer 4

检查一下数据库名称，最好打印$link 看看

Answer 5

你尝试用mysql_connect()链接下，然后var_dump($link),然后exit;看看是不是链接成功

Answer 6

mysqli_select_db()是这个函数链接