新手求解关于结果集和数组的对比问题。
1个表
----------------------------
| id | name | baodao| time |
| 2 |李小明 | 小明 | 22:10|
| 1 |张三明 | 小三 | 17:10|
------------------------------
首先我去采集 信息
$url="http://www.abc.com";
$duUrl=file_get_contents("$url");
$name="/bs\[.*\]\s*\=\s*new\s*Book\(\'[0-9]*\'\,\'(.*?)\'\,\'[0-9]*\'\,\'.*\'\,\'.*\'\,\'[0-9]*\'\,\'(.*?)\'\,\'[0-9]*\'\,\'.*\'\,\'[0-9]*\'\,\'.*\'\,\'(.*?)\'/iU";
preg_match_all($name,$duUrl,$xiaoname);
$a=$xiaoname[1];
$b=$xiaoname[2];
$c=$xiaoname[3]; // 这3个就是采集回来的values
问。假如采集回来的第一个,后边还有NNNN个。我
$a = 李小明;
$b = 23:13;
$c = 荣荣;
求解,当获取1个 $a的值时,我想拿去和数据库的 字段 baodao 里的值对比。
如果有就修改time字段,如果没有就跳过。
大概就这个样子。新手很难了解。。PHP大虾们,指点指点咯。
回复讨论(解决方案)
补充下,
当 $a的值是 李小明,就拿这个李小明做为搜索数据库的条件。如果有就把 $c=蓉蓉 $b 2个值修改。
如果没有就跳过。
我做到找出结果集后不会了。
$mysqli=new mysqli("localhost","root","aa","aa");
$mysqli->query("set names utf8");
if(mysqli_connect_errno()){
echo "错误:".mysqli_connect_error();
exit;
}
还有个想法就是。
竟然采集回来的是数组。
如果能把字段 name 里的所有值都 声明回array,
那就可以使用in_array来对比。如果有就插入,如果没就。。。
但name 声明回 array,这个是怎么做的?
$sql = "update biao set baodao='$b', time='$c' where name='$a'";
$mysqli->query($sql);
但你先要解决一个问题:当出现同名时如何处理
即 name 列有两个 李小明 怎么做?
$sql = "update biao set baodao='$b', time='$c' where name='$a'";
$mysqli->query($sql);
但你先要解决一个问题:当出现同名时如何处理
即 name 列有两个 李小明 怎么做?
李小明不会出现2个以上的,只有0或者1次。
很好,那问题不就解决了?
你的意思是不是 如果 数据库有这个字段 就更新 没有就插入啊
<?php if($mysqli->query("select * from biao where baodao = '$a'")){ //有结果就更新 $mysqli->query("update biao set baodao='$b', time='$c' where name='$a'"); }else{ //没结果就插入 $mysqli->query("insert into biao ('$a','b','c')"); }?>
<?php if($mysqli->query("select * from biao where baodao = '$a'")){ //有结果就更新 $mysqli->query("update biao set baodao='$b', time='$c' where name='$a'"); }else{ //没结果就插入 $mysqli->query("insert into biao ('$a','$b','$c')"); }?>
<?php if($mysqli->query("select * from biao where baodao = '$a'")){ //有结果就更新 $mysqli->query("update biao set baodao='$b', time='$c' where name='$a'"); }else{ //没结果就插入 $mysqli->query("insert into biao ('$a','$b','$c')"); }?>
没有就继续跳继续跳。跳到有为止,李小明的这些数据时人工添加,baodao| time 这2个字段时作为修正与日常维护所用的。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
