Php/func mysqli warning count

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PHP mysqli warning_count()函数

MySQL PHP MySQLi参考

示例-面向对象的样式

返回上一个查询的警告数:

<?php

$mysqli = new mysqli("localhost","my_user","my_password","my_db");


// Check connection
if ($mysqli -> connect_errno) {

  echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
  
  exit();

  }

$mysqli -> query("CREATE TABLE myPersons LIKE Persons");

$sql 
  = "INSERT INTO myPersons (FirstName) VALUES(

  'Hdghfhjgjtjyjn.,,ljkghfjbmbngfgffdhfhjgjgkjhlkhlkjljljlkjkljlkjkljkljlkj')";


$mysqli -> query($sql);

if ($mysqli -> warning_count) {
  
  if ($result = $mysqli -> query("SHOW WARNINGS")) {
    $row 
  = $result -> fetch_row();
    printf("%s (%d): %s\n", 
  $row[0], $row[1], $row[2]);
    $result -> close();
  
  }
}

$mysqli -> close();

?>



在底部查看程序样式的示例。

定义和用法

warning_count / mysqli_warning_count()函数返回上一次查询的警告数量。

句法

面向对象的样式:

$mysqli -> warning_count

程序风格:

mysqli_warning_count(connection)

参数值

参数 描述
connection 需要。指定要使用的MySQL连接

技术细节

返回值: 来自上一个查询的警告数。如果没有警告,则为0
PHP版本: 5+

示例-程序风格

返回上一个查询的警告数:

<?php

$con = mysqli_connect("localhost","my_user","my_password","my_db");


if (mysqli_connect_errno()) {

  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  
  exit();

  }

mysqli_query($con, "CREATE TABLE myPersons LIKE Persons");

$sql 
  = "INSERT INTO myPersons (FirstName) VALUES(
'Hdghfhjgjtjyjn.,,ljkghfjbmbngfgffdhfhjgjgkjhlkhlkjljljlkjkljlkjkljkljlkj')";


mysqli_query($con, $sql);

if (mysqli_warning_count($con)) {
  
  if ($result = mysqli_query($con, "SHOW WARNINGS")) {
    
  $row = mysql_fetch_row($result);
    printf("%s (%d): %s\n", 
  $row[0], $row[1], $row[2]);
    mysqli_free_result($result);
  
  }
}


  mysqli_close($con);

?>



MySQL PHP MySQLi参考