Backend Development
PHP Tutorial
Rounding function code in php (floor function, ceil function, round and intval)
Rounding function code in php (floor function, ceil function, round and intval)
This article mainly introduces the rounding function codes in PHP (floor function, ceil function, round and intval). It has certain reference value. Now I share it with you. Friends in need can refer to it
When dealing with floating point numbers in php, rounding is often required. There are two functions in PHP that are suitable for this situation: floor function, ceil function and round function
The combination of floor function and ceil function can make the data processed by PHP more real and reliable.
1. Let’s look at the floor function first:
Syntax:
float floor (float value)
Instructions:
Return the next integer not greater than value, and round off the decimal part of value. The type returned by floor() is still float because the range of float values is usually larger than that of integer.
floor() Example 1
<?php echo floor(1.6); // will output "1" echo floor(-1.6); // will output "-2" ?>
<?php echo(floor(0.60)); echo(floor(0.40)); echo(floor(5)); echo(floor(5.1)); echo(floor(-5.1)); echo(floor(-5.9)) ?>
0
0
5
5
-6
-6
2. Ceil function:
Syntax: float ceil (float value)Description: Returns no less than value The next integer, value is rounded up by one if there is a decimal part. The type returned by ceil() is still float because the range of float values is usually larger than that of integer. ceil() Example:<?php echo ceil(4.3); // 5 echo ceil(9.999); // 10 echo ceil(-3.14); // -3 ?>
//Page number calculation:
$lastpg=ceil($totle/$displaypg); //最后页，也是总页数,用ceil就方便多了。 $lastpg=$lastpg ? $lastpg : 1; //没有显示条目，置最后页为1 $page=min($lastpg,$page); $prepg=$page-1; //上一页 $nextpg=($page==$lastpg ? 0 : $page+1); //下一页 $firstcount=($page-1)*$displaypg;
3. Round function:
Syntax: float round (float val [, int precision])Instructions: Returns the result of rounding val according to the specified precision (the number of decimal digits after the decimal point). precision can also be negative or zero (default). round() Example<?php echo round(3.4); // 3 echo round(3.5); // 4 echo round(3.6); // 4 echo round(3.6, 0); // 4 echo round(1.95583, 2); // 1.96 echo round(1241757, -3); // 1242000 echo round(5.045, 2); // 5.05 echo round(5.055, 2); // 5.06 ?>
Convert the variable to an integer type.
Syntax: int intval(mixed var, int [base]);
Return value: integer
Function type: PHP system function
Content description
Example intval()
<?php echo intval(4.3); //4 echo intval(4.6); // 4 ?>
Note: If intval is a character type, it will be automatically converted to 0 such as
intval('abc');
Output result 0
If it is
intval('5fd');
Output result Yes
5
Related recommendations:
The above is the detailed content of Rounding function code in php (floor function, ceil function, round and intval). 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.
