Using abs() to obtain the absolute value of parameters in php
In the last article, we introduced "Using stripos() in php to obtain the position of the first occurrence of a string". This article will take you to take a look. abs()Function. In the daily use of php, we may need to obtain the absolute value of a variable. At this time, we can use the built-in function abs() function in php , this article first takes you to take a look at the syntax of the function:
abs ( mixed $number )
$number: the numeric value to be processed.
Return value : The absolute value of $number. If the parameter $number is float, the return type is also float, otherwise it returns integer (because float usually has a larger value range than integer).
Code example:
<?php $abs = abs(-4.2); $abs2 = abs(5); $abs3 = abs(-5); echo $abs."<br>"; echo $abs2."<br>"; echo $abs3."<br>"; ?>
输出： 4.2 5 5
Recommendation: 《2021 PHP interview questions summary (collection)》《 php video tutorial》
The above is the detailed content of Using abs() to obtain the absolute value of parameters in php. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Fixed: Windows Update Failed to Install
Aug 08, 2025 pm 04:16 PM
RuntheWindowsUpdateTroubleshooterviaSettings>Update&Security>Troubleshoottoautomaticallyfixcommonissues.2.ResetWindowsUpdatecomponentsbystoppingrelatedservices,renamingtheSoftwareDistributionandCatroot2folders,thenrestartingtheservicestocle
How to work with arrays in php
Aug 20, 2025 pm 07:01 PM
PHParrayshandledatacollectionsefficientlyusingindexedorassociativestructures;theyarecreatedwitharray()or[],accessedviakeys,modifiedbyassignment,iteratedwithforeach,andmanipulatedusingfunctionslikecount(),in_array(),array_key_exists(),array_push(),arr
Compare and contrast PHP Traits, Abstract Classes, and Interfaces with practical use cases.
Aug 11, 2025 pm 11:17 PM
Useinterfacestodefinecontractsforunrelatedclasses,ensuringtheyimplementspecificmethods;2.Useabstractclassestosharecommonlogicamongrelatedclasseswhileenforcinginheritance;3.Usetraitstoreuseutilitycodeacrossunrelatedclasseswithoutinheritance,promotingD
Fix: Ethernet 'Unidentified Network'
Aug 12, 2025 pm 01:53 PM
Restartyourrouterandcomputertoresolvetemporaryglitches.2.RuntheNetworkTroubleshooterviathesystemtraytoautomaticallyfixcommonissues.3.RenewtheIPaddressusingCommandPromptasadministratorbyrunningipconfig/release,ipconfig/renew,netshwinsockreset,andnetsh
How to use the $_COOKIE variable in php
Aug 20, 2025 pm 07:00 PM
$_COOKIEisaPHPsuperglobalforaccessingcookiessentbythebrowser;cookiesaresetusingsetcookie()beforeoutput,readvia$_COOKIE['name'],updatedbyresendingwithnewvalues,anddeletedbysettinganexpiredtimestamp,withsecuritybestpracticesincludinghttponly,secureflag
Describe the Observer design pattern and its implementation in PHP.
Aug 15, 2025 pm 01:54 PM
TheObserverdesignpatternenablesautomaticnotificationofdependentobjectswhenasubject'sstatechanges.1)Itdefinesaone-to-manydependencybetweenobjects;2)Thesubjectmaintainsalistofobserversandnotifiesthemviaacommoninterface;3)Observersimplementanupdatemetho
phpMyAdmin security best practices
Aug 17, 2025 am 01:56 AM
To effectively protect phpMyAdmin, multiple layers of security measures must be taken. 1. Restrict access through IP, only trusted IP connections are allowed; 2. Modify the default URL path to a name that is not easy to guess; 3. Use strong passwords and create a dedicated MySQL user with minimized permissions, and it is recommended to enable two-factor authentication; 4. Keep the phpMyAdmin version up to fix known vulnerabilities; 5. Strengthen the web server and PHP configuration, disable dangerous functions and restrict file execution; 6. Force HTTPS to encrypt communication to prevent credential leakage; 7. Disable phpMyAdmin when not in use or increase HTTP basic authentication; 8. Regularly monitor logs and configure fail2ban to defend against brute force cracking; 9. Delete setup and
Using XSLT Parameters to Create Dynamic Transformations
Aug 17, 2025 am 09:16 AM
XSLT parameters are a key mechanism for dynamic conversion through external passing values. 1. Use declared parameters and set default values; 2. Pass the actual value from application code (such as C#) through interfaces such as XsltArgumentList; 3. Control conditional processing, localization, data filtering or output format through $paramName reference parameters in the template; 4. Best practices include using meaningful names, providing default values, grouping related parameters, and performing value verification. The rational use of parameters can make XSLT style sheets highly reusable and maintainable, and the same style sheets can produce diversified output results based on different inputs.
