$file =isset ($file) && $file? $file: What does the "index" code mean?

$file =isset ($file) && $file? $file: ' Index '; What does the above code mean? It's best to give an example of what it actually does. Reply to discussion (solution) Determine if there is a $file variable, and if so, the value is $file if it

You can't get web content with PHP, but you can access Web content in a browser, what's the situation?

This post was last edited by u013067065 on 2014-01-03 13:46:46 Let's just infer from the facts what the problem is. 1. The server can use the browser to access the target Web page normally 2, the same URL with PHP can not access the content of the

How to insert HTML code blocks in PHP

I use PHP to query records from MySQL and then want to display different fields in different text in the form, and update the data. Want to insert a more complex form, with ECHO is too error-prone, you big God, there is no other way to achieve ah,

PHP recursively iterates through multidimensional arrays, merges duplicate values and records repeat times

Header (' content-type:text/html; Charset=utf-8 ');//The following is the original array $array = Array (0=>array (' text ' = ' Sports ', ' Children ' + = Array (' 0=>array ' (' text ' = ' = ' basketball ', ' grade ' = ' 1 '), 1=>array (' text ' = =

File Upload $_files[' XX ' [' tmp_name '] temporary file validity period solution?

To do a business, you need to extract data from the user's uploaded Excel, but you don't need to save Excel. I read the data by uploading temporary files $_files[' Excel ' [' Tmp_name ']. But will this temporary file be erased automatically? If it

Ask PHP for all variables, constants, including include loading data destruction mechanism

Because of the problem of PHP operating mechanism, after the execution of the program will do a series of cleanup work. Variable I know that 100% is cleared, and that there are const defined constants and class file data that is loaded with include

SQL statement that asks for two lines of time difference between different conditions in the same column

Table CREATE TABLE ' Hp_report ' (' id ' int (ten) unsigned NOT NULL auto_increment, ' code ' varchar (255) ' is not null ' ' content ' mediumt Ext NOT NULL, ' CTime ' datetime isn't null, Engine=myisam DEFAULT Charset=utf8 auto_increment=662555;

Some browsers cache the CAPTCHA, causing the verification code to expire when the page is reopened.

Refreshing the browser is normal. How to solve, what code can force the verification code re-loaded. Reply to discussion (solution) Add a js random parameter after the generated address, url?r=math.random () "> You add a non-cached header

Windows Apache is often stuck in the dead

Regular card-dead. What's going on, has anyone ever met? Error log [Sun Feb 03 18:16:09 2013] [Notice] Child 4200:all worker threads has exited. [Sun Feb 03 18:16:15 2013] [Notice] Child 4200:child process is exiting [Sun Feb 03 18:18:35 2013]

CentOS PHP installation memcached extension support SASL

1. Installing SASL Yum Install Cyrus-sasl-lib.x86_64yum Install cyrus-sasl-devel.x86_64 2. Download libmemcached wget https://launchpad.net/libmemcached/1.0/1.0.16/+download/libmemcached-1.0.16.tar.gz3, compiling and installing Tar zxvf

MySQL deposit emoji expression now for?

MySQL deposit emoji expression now for???. According to the online version of the MySQL character set to UTF8MB4, or invalid, displayed as garbled. Has anyone ever met you? Reply to discussion (solution) Emoji expression is an extended utf-16

How the time of 2014-1-1 after submission became 2014-01-01

When I import data using an Excel table, for example: $KQ _date= $data->sheets[0][' cells ' [$i][3]//This is the 3rd column, if it's 2014-1-1 So how to make $kq_date write to the database when it becomes 2014-01-01, because if it doesn't become 2014-

thinkphp3.2 Uploadify upload GUID is only called once in an upload how to implement?

What I want to achieve is that the uploadify upload image into the database automatically generate tokens to think of the GUID The upload class is using the thinkphp itself upload class results inserted into the database found that each picture is

PHP array Conversion String function, I use thinkphp, Json_encode save Chinese, backslash disappeared

PHP array Conversion String function, I use thinkphp, Json_encode save Chinese, backslash disappeared This is the original. [{"title": "\u5173\u6ce8\u65f6\u56de\u590d", "url": "\/index.php?g=user****"}] Turns out this is it. [{"title": "u5173u6ce8u65

Why developers have mixed opinions about PHP language

The PHP language, as a scripting language for server-side development, is well known for web development. After Rasmus Lerdorf was created in 1995, W3techs's survey showed that PHP accounted for 82% of known service-side programming languages. There

Steps for PHP to compile the OpenSSL module

PHP compiling OpenSSL steps of the module recently we intend to use composer to manage dependencies in the PHP framework, but when executing the composer installation command (below), it was discovered that the OpenSSL Extension class library was

PHP Email (126 Email and phpmailer Open source)

I. First DOWNLOAD Phpmailer Https://github.com/chenlian2015/phpmailer.git Two. In the downloaded directory, class.phpmailer.php class.smtp.php Two copies of files to your project directory Three. Use CharSet = "GBK";//Set the message

Socket communication PHP As a client, C + + as a service-side communication problem.

Recently want to do a title such things, now PHP send can succeed, C + + to make the correct corresponding: send a JSON string, but the C + + message sent by PHP can not receive ... Don't know why this is. Would you please help me? Is there a

Why use trim () to trim user-entered data?

I've seen a lot of programs trim user input data with trim, Why do you do this? The introduction of the book is to say that it is for the sake of safety. I'm kind of wondering, which one of the students is talking about Reply to discussion (

How to make your PHP support pthreads multithreading

We often run into a situation where the development environment is developed under Windows, and the production environment is actually Linux. Windows will work properly, but after uploading to Linux, you won't be able to play well. Then began a

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