PHP

Determine whether a file name is repeated during File upload. how can I determine whether a file name is repeated during File upload? I know $ _ FILES [& quot; form name & quot;] $ _ FILES [& quot; form name & quot;] [& quot; name & quot;] how does

& Lt ;? Phpeval ('echo & quot; programmer picture logic question. let's see your logic .. & Quot ;;');? & Gt; if I haven't come to the Forum for a long time, I will answer either or both of these questions. the question number is in the upper left

Ajax: How does the page receive the two-dimensional array returned by php !!! I used ajax to request a php file. in the php file, the json_encode () function is used to format the returned two-dimensional array. javascript uses xmlHttp. responseText

Ask a knowledgeable expert to discuss the encryption problem. in addition to the md5 encryption method, please give a name Example. MD5 is not encrypted. so please clarify the concept of encryption before asking questions, if you are interested, ask

PHP beginners! Ask! PHPcode $ con = mysql_connect (& quot; localhost & quot;, & quot; root & quot;, & quot; 1234 & quot;) ordie (& quot; & #193; & #172; & #189; & #211; & #202; & #167; & beginner PHP! Ask! PHP code

I want to add a low-level keyword function for a php applet, just like the word segmentation effect when the php applet is easy to collect. for example, the title is: I have never seen Altman's automatic word segmentation result: I have never | ever

How does php determine the first execution of a file? How does php determine the first execution of a file (test. php) I want to implement a function similar to the regular clearing of junk posts in a forum: several methods of php scheduled task

PHP script implementation turn to the target URL to write a go. php, such as accessing the http://www.xxxx.org/go.php? & Amp; from = yuantou & amp; go = www.baidu.com, go to www.baidu.com. the www.xxxx.org PHP script redirects to the target URL.

Php excel export garbled problem recently a php import and export excel; tried PHPEXCEL and Spreadsheet_Excel_Writer are not easy to use, save locally is easy to use, but the output browser is garbled, in addition, the garbled file should be the

How does one design databases for such cross-classification, such as www.shoes.com? the main types are classification tables and product tables. In this way, I set a brand table brand, a user object table (women, girl, men) user_scope, and a product

Image processing is very big for PHPGD Library image processing. who can explain the tutorial to me. thank you. gd is a little troublesome. please take it easy or find the encapsulated class library. There is also an image_magic Library, which is

Please help me explain, multi-table join, I don't understand, thank you SQLcodeselect * from (selectbookid, count (bookid) asdegreefromtb_borrowgroupbybookid) asborrjoin (s Please help explain, multi-table join, thank you! SQL code select *

What are the specific operations on web system optimization? In my opinion, 1. the number of database queries should be as few as possible and the query can be completed at a time. even if the SQL statements are complex, do not separate the queries

The Port of Apache cannot be installed, but cannot be installed. what should I do ?, What environment? Windows or Linux? In Windows, Apache cannot be installed. in Linux, check the INSTALL file before installing it. Looking forward to better

Class encapsulation verification diagram how to output + JS this is a class encapsulation verification diagram my question is how to call it PHPcode & lt; on another page ;? PhpclassImageCode {private $ randcode; class encapsulation verification

This is why FatalError: as soon as I add the following code to the webpage, loading will be slow and the Error prompt will appear: Fatalerror: Maximumexecutiontimeof30secondsexceededinE: \ xampp \ htdocs \ business \ lib \ function. As soon as I add

Why can I access my php file through a browser and see the normal output after parsing this php file. But why can I use PHPCLI to access my php file through a browser and see the normal output after parsing the php file. However, when I use PHPCLI

Why cannot I replace PHPcode & lt; with php regular expressions ;? Php $ page = '& lt ;! -- WebAppleHeader -- & gt; & lt; divclass = & quot; sheader & quot; & gt; & lt;/div & gt php regular expression replacement, why cannot it be replaced?

For php problems, please advise. after the configuration is input, the input localhost can be displayed normally, and the input localhost/x.jpg can also be displayed normally, but the input localhost/x. php cannot be displayed on the webpage.

About how mysql modifies ALTERTABLEpre_forum_attachmentCHANGE 'aid ''aid 'mediumint (8) unsignedNOTNULLAUTO_INCREMENT, the error message is # 1264-Outofrangevalue about mysql modification. Alter table pre_forum_attachment CHANGE 'aid ''' mediumint (