How to learn PHP array_fill() Definition and usage The array_fill() function fills an array with a given value. The returned array has number elements and the value is value. The returned array is numerically indexed, starting at the start position and increasing. If number is 0 or less than 0, an error occurs. Syntax array_fill(start,number,value) Parameter Description start required. A numeric value specifying the starting index of the key. number is required. Numeric value specifies the amount of padding, and its value must be greater than 0. value is required. Specifies the value to be inserted. Example output: Array ( [2] => Dog [3] => Dog [4] => Dog ) http://www.bkjia.com/PHPjc/834959.htmlwww.bkjia.comtruehttp://www .b
1. Detailed introduction to the array_fill function
Introduction: In the following example, we fill elements into the array through the Array.fill(arrayname, value) method and the Array.fill(arrayname, starting index, ending index, value) method of the Java Util class: /* author ;by w3cschool.cc File name: FillTest.jav...
2. Summary of the detailed introduction of the connection status
# Introduction: Check the number of concurrent connections and connection status of Nginx, etc. under Linux. 1. Check the number of concurrent requests of the Web server (Nginx Apache) and its TCP connection status: netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a,&n
3. Detailed explanation of php end() function and current() function usage examples
Introduction: The end() function in PHP points the internal pointer of the array to the last element and returns The value of the element, and the current() function returns the current element in the array (unit, which is the first element of the array. One of these two functions returns the first element of the array, and the other returns the last element of the array. The following Let’s take a look at the usage of these two.
Introduction: 1. Message Queue 1.1 Message Queue Message queue is a queue used to store messages. Messages are stored in the queue First-in-first-out, all window programs have message queues, and the program can obtain messages from the queue. 1.2 Types of message queues System message queue: A message queue maintained by the operating system, which stores messages generated by the system, such as mouse and keyboard messages. Wait. Program message queue: a message queue belonging to each application (thread), maintained by the application. #Form elements: the most complete variety of html. Summary of how to obtain and use form elements
##Introduction: A form is an interactive tool between a web page and a user. It consists of a The
