10 questions worth pondering in PHP face questions

Q1 The first question about weak types $str 1 = ' Yabadabadoo ';$str 2 = ' Yaba ';if (Strpos ($str 1, $str 2)) {echo "\". $str 1. "\" contains \ "". $str 2. "\"";} else {echo "\". $str 1. "\" does not contain \ "". $str 2. "\"";}Output of the

protected and const attribute in PHP class

Const property The field defined with the Const property is a constant, and the constants in the class are similar to static variables, but the difference is that once the value of a constant is assigned, it cannot be changed. The const definition

PHP programs run automatically, Windows schedule tasks

Specifically, if we need to run the Task Scheduler automatically, we should perform the following steps: 1. Click the Start button, and then select programs → attachments → system tools → task scheduler (or settings → control Panel → Task Scheduler)

Avoid PHP-FPM memory leaks resulting in memory exhaustion

fpm

For PHP-FPM multiple process mode, to avoid the memory leak problem is very simple, is to let php-cgi processing a certain number of processes after the exit.Otherwise, memory leaks caused by PHP programs or Third-party modules (such as ImageMagick

Opcache PHP New byte code cache extension detailed

Byte code cache component Zend optimizer+ now change the name to Zend Opcache. And after the PHP 5.5 version, will be integrated into the official PHP components, there is no need to install other apc,eaccelerator and so on. APC and Opcache are

PHP to export the contents of a database to Excel

The core code is here. The code is as follows Copy Code Header ("Content-type:application/vnd.ms-excel; Charset=utf-8 ");Header ("Pragma:public");Header ("expires:0");Header ("Cache-control:must-revalidate, Post-check=0,

A summary of various methods of zlib extension in PHP to realize gzip compression output

GZIP (Gnu-zip) is a compression technique. The page size can be turned into 30% or smaller after gzip compression. This way the user will feel very happy when browsing! Preparatory work 1, can not find the Php_zlib.dll file? Since the php4.3

Summary of iis+php error fastcgi error errors

FastCGI ErrorThe FastCGI Handler is unable to process the request. The FastCGI handler was unable to process the request.-------------------------------------------------------------------------------- Error Details: Unable to place a FastCGI

jquery+php Ajax File Upload implementation code

Many projects need to use the real-time upload function, for example, select the local picture, immediately upload and display the image. This article combined with examples to explain how to use jquery and PHP to achieve Ajax real-time upload file

PHP discuz chhome picture upload swfupload function

md5

PHP discuz chhome picture upload swfupload functionThis upload and discuz to compare, still far from the difference. function is also deficient.In addition to some of the built-in URL leads, we can not change, the other data are

PHP Country code Query function

PHP Country code Query functionfunction Transcountrycode ($code) {$index =array (' AA ' => ' Aruba '),' AD ' => ' Andorra ',' AE ' => ' UAE ',' AF ' => ' Afghanistan ',' AG ' => ' Antigua And Barbuda ',' AL ' => ' Albania ',' AM ' => ' Armenia ','

PHP Gets the current script directory GETCWD (), __file__

The path to get the current file today generally uses the following two functions.GETCWD () function GETCWD-Get Current working directory DescribeString GETCWD (Invalid)Gets the current working directory. return valueReturns the success on the

A detailed tutorial on manually compiling PHP-AMQP extensions in Linux under Ubuntu

PHP official website of the AMQP module introduced here, I do not introduce more. Below to enter the focus of the installation process. http://www.php.net/manual/en/book.amqp.php The default source for Ubuntu is not PHP5-AMQP this package, so use

Php explode () array_diff () implode () three functions

$ Str = 'Array 1, array 2, array 3, array 4 ';$ Array = explode (',', $ str); // Save the regular string to an arrayThe explode () function separates strings into arrays.SyntaxExplode (separator, string, limit) parameter descriptionSeparator is

PDF document generation technology based on PHP and XML

SummaryThis paper briefly introduces the principles of PHP, XML, PDF and other technologies and their application. We try to build an online PDF file generation system based on PHP and XML by using PHP object-oriented features. This article

Php cookie working principle and cookie instance details

Cookie and session statusFor BS development, these two concepts are essential. First, let's take a rough look. It is difficult to go deep without practical applications. For more information, see the reference address!What is Cookie?Cookie is a

Php _ call method instructions

Let's talk about the role of _ call: "A new special method added to the PHP5 object. This method is used to monitor other methods in an object. If you try to call a method that does not exist in an object, the __call method will be automatically

Example of catch exceptions in php

Try {} catch {} statement in pHPPHP 5 adds an exception handling module similar to other languages. Exceptions in PHP code can be thrown by throw statements and captured by catch statements. (Note: you must first throw it to obtain it)All codes that

Example of java call implemented by JavaBridge in php

1. Execute the jar file in java-jar/home/lichun/workspace/JavaBridge. jar (the premise is that the java environment has been configured in linux)2. Write your own java class The code is as follows: Copy code

PHP truncate string length (Chinese and English strings)

Take some strings.Syntax: string substr (string, int start, int [length]);Return value: stringFunction type: data processingDescriptionThis function extracts the start character of the string from the start character. If start is a negative number,

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