Php 如何直接输出mysqli_fetch_field_?
我正在尝试将此代码从mysql转换为mysqli。但当我打印它并在excel文件中打开时,我得到了一个错误 可捕获的致命错误:stdClass类的对象无法转换为第139行C:\xamplite\htdocs\app\text2.php中的字符串Php 如何直接输出mysqli_fetch_field_?,php,mysqli,Php,Mysqli,我正在尝试将此代码从mysql转换为mysqli。但当我打印它并在excel文件中打开时,我得到了一个错误 可捕获的致命错误:stdClass类的对象无法转换为第139行C:\xamplite\htdocs\app\text2.php中的字符串 有人能教我如何在mysqli中正确转换此代码吗 <?PHP //EDIT YOUR MySQL Connection Info: $DB_Server = "localhost"; //your MySQL Se
有人能教我如何在mysqli中正确转换此代码吗
<?PHP
//EDIT YOUR MySQL Connection Info:
$DB_Server = "localhost"; //your MySQL Server
$DB_Username = "root"; //your MySQL User Name
$DB_Password = ""; //your MySQL Password
$DB_DBName = "app"; //your MySQL Database Name
$DB_TBLName = "purchase_order"; //your MySQL Table Name
$mysqli = new mysqli("localhost", "root", "", "app");
//$DB_TBLName, $DB_DBName, may also be commented out & passed to the browser
//as parameters in a query string, so that this code may be easily reused for
//any MySQL table or any MySQL database on your server
if (isset($_POST['supp'])) {
$var = $_POST['supp'];
//DEFINE SQL QUERY:
//edit this to suit your needs
$result = $mysqli->query("Select id, counter, supplier, quantity, unit_cost, SUM(quantity*unit_cost) total_amount from $DB_TBLName where supplier='$var' GROUP BY id");
}
//Optional: print out title to top of Excel or Word file with Timestamp
//for when file was generated:
//set $Use_Titel = 1 to generate title, 0 not to use title
$Use_Title = 1;
//define date for title: EDIT this to create the time-format you need
$now_date = DATE('m-d-Y H:i');
//define title for .doc or .xls file: EDIT this if you want
$title = "Dump For Table $DB_TBLName from Database $DB_DBName on $now_date";
/*
Leave the connection info below as it is:
just edit the above.
(Editing of code past this point recommended only for advanced users.)
*/
//create MySQL connection
//execute query
//if this parameter is included ($w=1), file returned will be in word format ('.doc')
//if parameter is not included, file returned will be in excel format ('.xls')
IF (ISSET($w) && ($w==1))
{
$file_type = "msword";
$file_ending = "doc";
}ELSE{
$file_type = "vnd.ms-excel";
$file_ending = "xls";
}
//header info for browser: determines file type ('.doc' or '.xls')
HEADER("Content-Type: application/$file_type");
HEADER("Content-Disposition: attachment; filename=MDT_DB_$now_date.$file_ending");
HEADER("Pragma: no-cache");
HEADER("Expires: 0");
/* Start of Formatting for Word or Excel */
IF (ISSET($w) && ($w==1)) //check for $w again
{
/* FORMATTING FOR WORD DOCUMENTS ('.doc') */
//create title with timestamp:
IF ($Use_Title == 1)
{
//ECHO("$title\n\n");
}
//define separator (defines columns in excel & tabs in word)
$sep = "\n"; //new line character
while($row = $result->mysqli_fetch_row())
{
//set_time_limit(60); // HaRa
$schema_insert = "";
FOR($j=0; $j<mysqli_num_fields($result);$j++)
{
//define field names
$field_name = mysqli_fetch_field_direct($result,$j);
//will show name of fields
$schema_insert .= "$field_name:\t";
IF(!ISSET($row[$j])) {
$schema_insert .= "NULL".$sep;
}
ELSEIF ($row[$j] != "") {
$schema_insert .= "$row[$j]".$sep;
}
ELSE {
$schema_insert .= "".$sep;
}
}
$schema_insert = STR_REPLACE($sep."$", "", $schema_insert);
$schema_insert .= "\t";
PRINT(TRIM($schema_insert));
//end of each mysql row
//creates line to separate data from each MySQL table row
PRINT "\n----------------------------------------------------\n";
}
}ELSE{
/* FORMATTING FOR EXCEL DOCUMENTS ('.xls') */
//create title with timestamp:
IF ($Use_Title == 1)
{
//ECHO("$title");
}
//define separator (defines columns in excel & tabs in word)
$sep = "\t"; //tabbed character
//start of printing column names as names of MySQL fields
FOR ($i = 0; $i < mysqli_num_fields($result); $i++)
{
ECHO mysqli_fetch_field_direct($result,$i) . "\t";
}
PRINT("\n");
//end of printing column names
//start while loop to get data
while($row = $result->mysqli_fetch_row())
{
//set_time_limit(60); // HaRa
$schema_insert = "";
FOR($j=0; $j<mysqli_num_fields($result);$j++)
{
IF(!ISSET($row[$j]))
$schema_insert .= "NULL".$sep;
ELSEIF ($row[$j] != "")
$schema_insert .= "$row[$j]".$sep;
ELSE
$schema_insert .= "".$sep;
}
$schema_insert = STR_REPLACE($sep."$", "", $schema_insert);
//following fix suggested by Josue (thanks, Josue!)
//this corrects output in excel when table fields contain \n or \r
//these two characters are now replaced with a space
$schema_insert = PREG_REPLACE("/\r\n|\n\r|\n|\r/", " ", $schema_insert);
$schema_insert .= "\t";
PRINT(TRIM($schema_insert));
PRINT "\n";
}
}
?>
这是错误线
137 FOR ($i = 0; $i < mysqli_num_fields($result); $i++)
138 {
139 ECHO mysqli_fetch_field_direct($result,$i) . "\t";
140 }
137用于($i=0;$i
您无法从中回显输出,因为它:
返回一个对象,该对象包含来自
指定的结果集
相反,尝试以下方法()来了解返回对象包含的内容:
$finfo = mysqli_fetch_field_direct($result,$i);
printf("Name: %s\n", $finfo->name);
printf("Table: %s\n", $finfo->table);
printf("max. Len: %d\n", $finfo->max_length);
printf("Flags: %d\n", $finfo->flags);
printf("Type: %d\n", $finfo->type);
试试这个
将此代码放在$mysqli=newmysqli(“本地主机”、“根目录”、“应用程序”)之前代码>行
错误报告(E\u全部^E\u通知^E\u已弃用)代码>您没有正确使用mysqli\u fetch\u row()
如果要使用面向对象的样式,则需要使用
while($row = $result->fetch_row())
但是,如果要使用程序样式
while($row = mysqli_fetch_row($result))
你只是有点落后:)
函数请使用小写字母。这取决于您想如何使用fetch\u field\u direct
。。。您可以这样做,然后循环中的每个结果都将输出它不回显表中的记录,我收到了这个错误致命错误:调用C:\xamplite\htdocs\app\text2.php中未定义的方法mysqli_result::mysqli_fetch_row(),位于151行
第151行($row=$result->mysqli_fetch row())您是否正在检查查询是否返回任何行?尝试以下操作:$result=$mysqli->query(“选择id、计数器、供应商、数量、单位成本、金额(数量*单位成本)总计金额来自$DB\u TBLName,其中供应商=“$var”按id分组”);printf(“选择返回的%d行。\n”,$result->num\u行)代码>您还可以回显有关变量的var_dump(),以了解其中的内容。。。