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Usage details of CURLOPT_POSTFIELDS parameter of CURL in PHP

CURL is indeed a good tool, not only in PHP but also in other operating systems. It is very easy to use. But if you don’t use some parameters well, you may not get the results you want.

Dec 23, 2016 pm 03:18 PM

Use Curl, socket, file_get_contents three methods in POST to submit data

The implementation code for POST submission of data using three methods: Curl, socket, and file_get_contents in PHP, friends in need can refer to it.

Dec 23, 2016 pm 03:16 PM

An in-depth analysis of Linux device driver interrupts (1) (3)

6. Non-reentrancy of interrupt handlers In the previous section, we mentioned that sometimes interrupts need to be masked, but why should we mask this interrupt? This is not because it is technically impossible to parallelize the same interrupt routine, but because of management considerations.

Dec 23, 2016 pm 02:32 PM

An in-depth analysis of Linux device driver interrupts (1) (2)

4. Interrupt handler The interrupt handler in Linux is very unique. Its interrupt handler is divided into two parts: the upper half (tophalf) and the lower half (bottom half). The reason why there is an upper half and a lower half is entirely due to interrupt processing.

Dec 23, 2016 pm 02:31 PM

An in-depth analysis of Linux device driver interrupts (1)

1. Introduction Linux interrupts are divided into two types: soft interrupts and hard interrupts. Let me state that the meaning of soft and hard here refers to software-related and hardware-related, rather than software-implemented interrupts or hardware-implemented interrupts. Softirq is

Dec 23, 2016 pm 02:30 PM

Selection, establishment and use of PHP development environment (2)

alright. There are several installation methods to choose from here, because Zend has done a good job in this regard. If you are going to install Apache as a server, then just install the Zend Studio we downloaded, but its Apache is 1.x Version. and

Dec 23, 2016 pm 02:26 PM

Selection, establishment and use of PHP development environment (1)

The reason why PHP discourages many beginners is the relatively complicated establishment of a PHP debugging environment. The PHP testing environment is the first problem to solve when learning PHP. Therefore, this article begins by addressing this overarching question. PHP environment configuration is very flexible, here I will

Dec 23, 2016 pm 02:21 PM

Device Mapper mechanism in Linux system kernel (1) (5)

The user space part of the device mapper is optional for developers to implement their own storage management tools. In fact, many of our common logical volume managers, such as LVM2, dmraid and other tools, use the device mapper provided by the device mapper. user space

Dec 23, 2016 pm 02:11 PM

Device Mapper mechanism in the Linux system kernel (1) (4)

User space part Device mapper is relatively simple in user space, mainly including device mapper library and dmsetup tool. The Device mapper library is an encapsulation of the necessary operations required for ioctl and user space to create and delete device mapper logical devices. dmsetup is a library that provides

Dec 23, 2016 pm 02:10 PM

Device Mapper mechanism in the Linux system kernel (1) (3)

3. The user space command calls the table_load function through ioctl. This function builds the mapping table of the specified mapped device and the mapped target device based on the parameters passed from the user space. This function first builds the corresponding dm_table and dm_target structures, and then calls dm-tabl

Dec 23, 2016 pm 02:08 PM

Device Mapper mechanism in Linux system kernel (1) (2)

Let's take a closer look at the specific implementation of the above three objects in the code. The mapped_device structure defined in the dm.c file is used to represent the mapped device. It mainly includes the lock related to the mapped device, the registered request queue and some memory pools and points to it.

Dec 23, 2016 pm 02:06 PM

Implementation of a keyboard driver for an embedded Linux system (1) (2)

Initialization part. This part includes initialization on the hardware layer and software layer. In this example, you need to configure the matrix circuit and the GPIO ports used by the SN74hc164 chip first so that the CPU can control and access them. In order to configure a GPIO port

Dec 23, 2016 pm 02:03 PM

Implementation of a keyboard driver for an embedded Linux system (1)

1 Introduction Linux has been widely used in embedded systems due to its many advantages such as a powerful and stable kernel, easy expansion and reduction, and rich hardware support. Many embedded Linux systems, especially those with strong interaction with users

Dec 23, 2016 pm 01:45 PM

PHP input stream php://input example explanation

This article mainly introduces the PHP input stream php://input examples and provides examples for in-depth study of the input stream php://input. Interested friends can refer to it.

Dec 23, 2016 pm 01:01 PM