Page 75-PHP Problem Programming Tutorials: Learn PHP Problem Online-php.cn

Article Tags

PHP Problem

Home

Technical articles

Backend Development

PHP Problem

How to exclude duplicate arrays in PHP

Methods to exclude duplicate arrays in PHP: 1. Create a PHP sample file; 2. Define the array to be deduplicated as "$oldArr" and the new array after deduplication as "$newArr"; 3. Use "array_unique()" The function removes duplicate elements from the array and returns the deduplicated array. The code is "$newArr = array_unique($oldArr);" to eliminate duplicate elements. 4. Deduplication can also be performed through a for loop.

Jun 05, 2023 pm 02:53 PM

php数组数组去重

Why doesn't sublime work with php?

Reasons and solutions for sublime not working with PHP: 1. There is no PHP plug-in installed. It is recommended to install a plug-in named "PHP Completions Kit"; 2. Check whether the file type is set correctly and ensure that Sublime recognizes it as a PHP file type; 3. , encoding problem, the PHP file uses some special characters, you can add the "#coding:utf-8" statement in the header of the file or convert the file encoding to UTF-8 without BOM.

Jun 05, 2023 pm 02:49 PM

phpsublime

What are the methods for php to implement jump and carry post data?

The methods for PHP to implement jumps and carry post data are: 1. Use Session to store POST data in the session, and then request and process it after jumping to the next page; 2. Use the GET method when redirecting and append POST at the same time. Parameters, note that the POST parameters need to be serialized when redirecting, and use the GET method to carry them at the end of the redirect link.

Jun 05, 2023 pm 02:18 PM

php

How to remove path suffix in php

How to remove the path suffix in PHP: 1. Get the file name in the URL through the "basename()" function and ignore the ".php" suffix, then use the "dirname()" function to get the directory name of the URL, and finally use the path and Construct a new URL from the file name; 3. Use regular expressions to remove the path suffix. For some specific situations, the flexibility of regular expressions is more suitable.

Jun 05, 2023 pm 01:53 PM

php

What is the usage of function() in php

function() in php is a grammatical structure used to define a function. Its usage is: 1. Use the "function" keyword to specify the definition of a new function; 2. Write the parameter list of the function in the "function()" brackets ;3. Write the function body in the curly braces of "function(){}" and end with ";".

Jun 05, 2023 pm 01:17 PM

php

How to verify that regular expression only has numbers in php

How to implement regular expression verification with only numbers in PHP: 1. Create a PHP sample file; 2. Create a string variable to be verified as "$num"; 3. Use the if statement to judge and the "preg_match()" function to perform regular expression Expression verification, the syntax is "if(preg_match('/\D/', $num))"; 4. Output the result through "echo".

Jun 05, 2023 pm 12:46 PM

php

How to use regular matching in php to remove html

The method for PHP to use regular matching to remove HTML is: 1. Create a PHP sample file; 2. Define the variable $html, which contains HTML tags and text; 3. Use the "preg_replace()" function to replace all HTML tags with spaces. The syntax is: "preg_replace('/(<[^>]+>| |\s+)/u', ' ', $html)"; 4. Use the built-in function "trim()" to remove the leading and trailing spaces in the string, echo and output the result That’s it.

Jun 05, 2023 am 11:44 AM

phphtml

Are php methods called in other files?

The php method can be called in other files. The calling method is: 1. Use the "include" function to include the file, and then use the "function_name()" syntax to call it; 2. Use the "function_name" function to define a name space, and then use the "function_name()" syntax to call it.

Jun 05, 2023 am 11:10 AM

phpPHP调用

What is the difference between c language and php

The difference between C language and PHP is: 1. Type definition and variable declaration methods are different. C language needs to declare all variables in advance, while in PHP you can use undeclared variables at will. C language also needs to specify types for variables, but PHP No; 2. The memory management methods are different. C language needs to manually allocate memory space for each variable, while PHP manages the memory by its own virtual machine.

Jun 05, 2023 am 10:54 AM

C语言php

How to log in and jump to pass value in php

PHP login jump value transfer method: 1. POST value transfer, use the HTML "form" form jump method to post value transfer; 2. GET transfer value, use the tag to jump to xxx.php , obtain the passed value through "$_GET['id']"; 3. SESSION passes the value. Once saved in SESSION, other pages can be obtained through SESSION.

Jun 05, 2023 am 10:44 AM

php跳转

What are the ways to implement division and rounding in PHP?

The methods for implementing division and rounding in PHP are: 1. Use the "intval()" function to perform rounding operations. The syntax is "intval (divisor variable/divisor variable)"; 2. Use the "round()" function to perform rounding. Operation, the syntax is "round (divisor variable / dividend variable)"; 3. Use the "floatdiv()" function to perform floating point operations and use the "intval()" function to round, the syntax is "intval(floatdiv(divisor, dividend) ".

Jun 05, 2023 am 10:29 AM

php

How to query to remove not equal to field in php

How to remove the unequal field in PHP query: 1. Create a PHP sample file; 2. Use "$variable" to define variables; 3. Use the "!=" operator to determine whether the variable is not equal to the required value; 4. Execute "echo" to output the operation result.

Jun 05, 2023 am 10:19 AM

php

What does predefinition mean in php

Predefinition in PHP refers to the built-in constants, variables and functions that are considered globally available. These contents do not need to be specially introduced or declared and exist in the PHP language itself.

Jun 05, 2023 am 10:00 AM

php

What is the impact of php not having zendoptimizer?

The absence of zendoptimizer in PHP may have some impact on performance and functionality: 1. zendoptimizer can decode and execute PHP code compiled with the Zend encoder. Losing it will result in the inability to decode the encoded code, causing the application to fail to work properly; 2. zendoptimizer includes some caching mechanisms that can improve its performance when executing the same piece of PHP code multiple times. Losing it may result in lower performance.

Jun 05, 2023 am 09:55 AM

zendoptimizerphp