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php數據列印

發布時間: 2022-02-28 15:38:22

1. php中怎麼列印數組啊

php中列印數組的步驟如下:

1、首先在編輯器中的菜單欄中點擊文件,然後點擊新建。

2. PHP如何將資料庫表中的某列數據一個一個循環取出並列印

一般我們為了減少資料庫鏈接,取數據是一次取出所有想要的數據然後做循環處理,而不是一個個循環取出

$servername="localhost";
$username="root";
$password="root";
$dbname="aaaa";

//創建連接
$conn=newmysqli($servername,$username,$password,$dbname);
//Checkconnection
if($conn->connect_error){
die("連接失敗:".$conn->connect_error);
}
$conn->query('setnamesutf8');
$sql="SELECTnameFROMxiao";//這里是查詢xiao表的name列的所有數據
$result=$conn->query($sql);

if($result->num_rows>0){
//輸出數據
while($row=$result->fetch_assoc()){
//print_r($row);
echo"name:".$row["name"]."<br>";//這里是循環列印
}
}else{
echo"沒有查詢到數據";
}
$conn->close();

3. PHP 如何漂亮地列印數組

php列印數組有兩個函數:print_r()函數和var_mp()函數
print_r()函數
例子:

<?php $arr_test =array(1, 2, 3); print_r($arr_test);?>

運行該例子輸出:
Array
( [0] => 1 [1] => 2 [2] => 3
)
var_mp()函數
例子:

<?php$arr_test = array(1, 2,3);var_mp($arr_test);?>

運行該例子輸出:
array(3)
{
[0]=> int(1)
[1]=> int(2)
[2]=> int(3)
}
var_mp()函數同print_r()函數用法一樣。不過var_mp()函數功能比print_r()更強大,可以同時列印多個變數且給出變數的類型信息。

4. php 怎麼實現列印 功能啊 直接列印html中的table 而且為word格式 table里的內容是通過資料庫獲取出來的

你的列印是不是編程語言裡面說的列印,例如basic語言的print語句,如果是的話,在PHP裡面使用echo語句列印內容,例如:
echo '<table border=1><tr><td>1<td>2</table>';

如果你是希望程序運行後在列印機上列印輸出內容,那可能比較復雜,而且不是PHP的強項,需要編寫許多查找列印機的代碼,簡單的做法是把數據送我特殊設備,可以使用file_put_contents函數,例如:
file_put_contents('PRN:', 'print test');

5. php 中,怎麼列印$_POST傳過來得值

$_post的值處理過後,通過用戶名去查詢數據表(請注意用戶名是唯一的),根據返回的數據檢查密碼是否正確,正確後寫cookie

6. PHP怎麼輸出數據

echo
print();
print_r();
var_mp();

7. PHP如何輸出資料庫的每條數據

//這是因為你從資源型結果集中獲取數據時只獲取了一次,如果查詢為多條數據應該迭代資源型結果集

$r=mysql_query($sql);//你的結果集

$result=[];
while(true){
$ary=mysql_fetch_assoc($r);//取出第一條數據,數據指針向後移動一位
if($ary){
$result[]=$ary;//存儲到結果數組中
}else{
break;//如果取出的結果為false,則代表數據獲取完畢,終止循環
}
}

echo'<pre>';
print_r($result);//列印最終結果
echo'</pre>';

8. php怎麼輸出資料庫中的一個數據

一、首先你需要在 $result=mysql_query($sql); 這一行之後取一下數據:

$row = mysql_fetch_array($result);

具體原因請看我以前回答過的問題:http://..com/question/142246646

二、之後查看獲取到的數據:
1. 查看具體值:
echo $result[0];

2. 列印數組(使用源代碼看的情況下會很清楚)
print_r($row);

3. 使用php自帶的調試函數看數據結構:
var_mp($row);

9. PHP輸出數據

得使用mysqli類啊,得看看基礎的語法嘍

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10. PHP裡面怎麼輸出數據

您好,PHP輸出數據有四種方式,echo、var_mp、print_r、retrun(這個一般是PHP框架常用)

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