PHP連接數(shù)據(jù)庫后總是提示格式錯(cuò)誤要怎么解決？求指點(diǎn)~

查看PHP7.1官方文檔，對(duì)這種錯(cuò)誤的解釋

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New E_WARNING and E_NOTICE errors have been introduced when invalid strings are coerced using operators expecting numbers (+ - * / ** % | ^) or their assignment equivalents. An E_NOTICE is emitted when the string begins with a numeric value but contains trailing non-numeric characters, and an E_WARNING is emitted when the string does not contain a numeric value.

在使用(+ - * / ** % | ^) 運(yùn)算時(shí)，例如a+b，如果a是開始一個(gè)數(shù)字值，但包含非數(shù)字字符(123a)，b不是數(shù)字值開始時(shí)(b456)，就會(huì)有A non-numeric value encountered警告。

你的里面年月日的表達(dá)用了-，php認(rèn)為是減號(hào)，年月日被認(rèn)為是運(yùn)算。

你可以搜一下網(wǎng)上的教程有解決辦法。不過看你的截圖，這只是個(gè)notice, 你可以在控制器加上ini_set("error_reporting","E_ALL ~E_NOTICE");?就不會(huì)顯示了。

php讀取mysql數(shù)據(jù)庫不顯示?

html

head

title瀏覽表中記錄/title

/head

body

center

?php

$db_host=localhost; //MYSQL服務(wù)器名

$db_user=root; //MYSQL用戶名

$db_pass=""; //MYSQL用戶對(duì)應(yīng)密碼

$db_name="test"; //要操作的數(shù)據(jù)庫

//使用mysql_connect()函數(shù)對(duì)服務(wù)器進(jìn)行連接，如果出錯(cuò)返回相應(yīng)信息

$link=mysql_connect($db_host,$db_user,$db_pass)or die("不能連接到服務(wù)器".mysql_error());

mysql_select_db($db_name,$link); //選擇相應(yīng)的數(shù)據(jù)庫，這里選擇test庫

$sql="select * from test1"; //先執(zhí)行SQL語句顯示所有記錄以與插入后相比較

$result=mysql_query($sql,$link); //使用mysql_query()發(fā)送SQL請(qǐng)求

echo "當(dāng)前表中的記錄有：";

echo "table border=1"; //使用表格格式化數(shù)據(jù)

echo "trtdID/tdtd姓名/tdtd郵箱/tdtd電話/tdtd地址/td/tr";

while($row=mysql_fetch_array($result)) //遍歷SQL語句執(zhí)行結(jié)果把值賦給數(shù)組

{

echo "tr";

echo "td".$row[id]."/td"; //顯示ID

echo "td".$row[name]." /td"; //顯示姓名

echo "td".$row[mail]." /td"; //顯示郵箱

echo "td".$row[phone]." /td"; //顯示電話

echo "td".$row[address]." /td"; //顯示地址

echo "/tr";

}

echo "/table";

?

/center

/body

/html

php表單寫入mysql數(shù)據(jù)庫的代碼

!--表單文件，拷入index.php--

!DOCTYPE?html

html

head

style

label{display:inline-block;width:100px;margin-bottom:10px;}

/style

titleAdd?students/title

/head

body

!--?數(shù)據(jù)庫用mysqli?面向過程調(diào)用方法--

form?method="post"?action="write2db.php"

!--數(shù)據(jù)庫用mysqli?面向過程調(diào)用方法

form?method="post"?action="write2db_sqlio.php"

--

!--數(shù)據(jù)庫用PDO調(diào)用方法

form?method="post"?action="write2db_pdo.php"

--

labelFirst?Name/label

input?type="text"?name="first_name"?/

br?/

labelLast?Name/label

input?type="text"?name="last_name"?/

br?/

labeldepartment/label

input?type="text"?name="department"?/

br?/

labelEmail/label

input?type="text"?name="email"?/

br?/

input?type="submit"?value="Add?students"

/form

/body

/html

------------------------------

?php

//拷貝命名為write2db.php,數(shù)據(jù)庫用mysqli?面向過程調(diào)用方法

//print_r($_POST);

//?create?a?variable

$first_name=$_POST['first_name'];

$last_name=$_POST['last_name'];

$department=$_POST['department'];

$email=$_POST['email'];

//調(diào)試用

echo?"Your?input:?";

echo?$first_name;

echo?'br?/';

echo?$last_name;

echo?'br?/';

echo?$department;

echo?'br?/';

echo?$email;

echo?'br?/';

$servername?=?"localhost";

//Your?database?username?and?password

//$username?=?"username";

//$password?=?"password";

$username?=?"tester";

$password?=?"testerPassword";

//your?database?name

$dbname?=?"test";

$tablename?="student";

//?Create?connection

$connect?=?mysqli_connect($servername,?$username,?$password,?$dbname);

if?(!$connect)?{

die("Connection?failed:?"?.?mysqli_connect_error());

}

//Execute?the?query

$sql="INSERT?INTO?$tablename?(first_name,last_name,department,email)

VALUES('$first_name','$last_name','$department','$email')";

if?(mysqli_query($connect,?$sql))?{

echo?"Hooray!?New?record?is?inserted?to?database?successfully.?Please?check?database.";

}?else?{

echo?"Error:?"?.?$sql?.?"br?/"?.?mysqli_error($connect);

}

mysqli_close($connect);

?

?php

//拷貝命名為write2db_sqlio.php,數(shù)據(jù)庫用mysqli?面向?qū)ο笳{(diào)用方法

//print_r($_POST);

//?create?a?variable

$first_name=$_POST['first_name'];

$last_name=$_POST['last_name'];

$department=$_POST['department'];

$email=$_POST['email'];

//調(diào)試用

echo?"Your?input:?";

echo?$first_name;

echo?'br?/';

echo?$last_name;

echo?'br?/';

echo?$department;

echo?'br?/';

echo?$email;

echo?'br?/';

$servername?=?"localhost";

//Your?database?username?and?password

//$username?=?"username";

//$password?=?"password";

$username?=?"tester";

$password?=?"testerPassword";

//database?name

$dbname?=?"test";

$tablename?="student";

//?Create?connection

$conn?=?new?mysqli($servername,?$username,?$password,?$dbname);

//?Check?connection

if?($conn-connect_error)?{

die("Connection?failed:?"?.?$conn-connect_error);

}?

$sql="INSERT?INTO?$tablename?(first_name,last_name,department,email)

VALUES('$first_name','$last_name','$department','$email')";

if?($conn-query($sql)?===?TRUE)?{

echo?"New?record?created?successfully";

}?else?{

echo?"Error:?"?.?$sql?.?"br"?.?$conn-error;

}

$conn-close();

?

?php

//拷貝為文件write2db_pdo.php,數(shù)據(jù)庫用PDO調(diào)用方法

//print_r($_POST);

a?variable

$first_name=$_POST['first_name'];

$last_name=$_POST['last_name'];

$department=$_POST['department'];

$email=$_POST['email'];

//調(diào)試用

echo?"Your?input:?";

echo?$first_name;

echo?'br?/';

echo?$last_name;

echo?'br?/';

echo?$department;

echo?'br?/';

echo?$email;

echo?'br?/';

$servername?=?"localhost";

//Your?database?username?and?password

//$username?=?"username";

//$password?=?"password";

$username?=?"tester";

$password?=?"testerPassword";

//your?database?name

$dbname?=?"test";

$tablename?="student";

//?Create?connection

try?{

$conn?=?new?PDO("mysql:host=$servername;dbname=$dbname",?$username,?$password);

//?set?the?PDO?error?mode?to?exception

$conn-setAttribute(PDO::ATTR_ERRMODE,?PDO::ERRMODE_EXCEPTION);

$sql="INSERT?INTO?$tablename?(first_name,last_name,department,email)

VALUES('$first_name','$last_name','$department','$email')";

//?use?exec()?

$conn-exec($sql);

echo?"New?record?created?successfully";

}

catch(PDOException?$e)

{

echo?$sql?.?"br"?.?$e-getMessage();

}

$conn?=?null;

?

--創(chuàng)建數(shù)據(jù)庫test,?將此文件存為test.sql?導(dǎo)入數(shù)據(jù)庫，或者手動(dòng)創(chuàng)建表結(jié)構(gòu)

--?phpMyAdmin?SQL?Dump

--?version?4.7.4

--?

--

--?Host:?127.0.0.1:3306

--?Generation?Time:?Mar?12,?2018?at?04:04?AM

--?Server?version:?5.7.19

--?PHP?Version:?7.1.9

SET?SQL_MODE?=?"NO_AUTO_VALUE_ON_ZERO";

SET?AUTOCOMMIT?=?0;

START?TRANSACTION;

SET?time_zone?=?"+00:00";

/*!40101?SET?@OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT?*/;

/*!40101?SET?@OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS?*/;

/*!40101?SET?@OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION?*/;

/*!40101?SET?NAMES?utf8mb4?*/;

--

--?Database:?`test`

--

--?--------------------------------------------------------

--

--?Table?structure?for?table?`student`

--

DROP?TABLE?IF?EXISTS?`student`;

CREATE?TABLE?IF?NOT?EXISTS?`student`?(

`id`?tinyint(3)?UNSIGNED?NOT?NULL?AUTO_INCREMENT,

`first_name`?varchar(20)?NOT?NULL,

`last_name`?varchar(20)?NOT?NULL,

`department`?varchar(50)?NOT?NULL,

`email`?varchar(50)?NOT?NULL,

PRIMARY?KEY?(`id`)

)?ENGINE=MyISAM?AUTO_INCREMENT=2?DEFAULT?CHARSET=utf8;

--

--?Dumping?data?for?table?`student`

--

INSERT?INTO?`student`?(`id`,?`first_name`,?`last_name`,?`department`,?`email`)?VALUES

(1,?'first1',?'last1',?'cs',?'1985@qq.com');

COMMIT;

/*!40101?SET?CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT?*/;

/*!40101?SET?CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS?*/;

/*!40101?SET?COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION?*/;

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