smnandre/easing-functions
Composer 安装命令：
composer require smnandre/easing-functions
包简介
Easing & Timing Functions - Cubic-Bezier, EaseIn, Quad ...
关键字：
README 文档
README
composer require smnandre/easing-functions
EasingFunctions is a PHP library that provides a collection of easing functions commonly used in animations, transitions, and smooth interpolations.
It includes standard easing equations: quadratic, cubic, quartic, quintic, sine, exponential, circular, elastic, and bounce functions.
Each of them is available in three variations:
- In: The motion starts slowly and accelerates.
- Out: The motion starts quickly and decelerates.
- InOut: A combination of both, accelerating at the start and decelerating at the end.
Easing Functions
| x | In | Out | InOut |
|---|---|---|---|
| Cubic |  easeInCubic |
 easeOutCubic |
 easeInOutCubic |
| Quart |  easeInQuart |
 easeOutQuart |
 easeInOutQuart |
| Quad |  easeInQuad |
 easeOutQuad |
 easeInOutQuad |
| Quint |  easeInQuint |
 easeOutQuint |
 easeInOutQuint |
| Sine |  easeInSine |
 easeOutSine |
 easeInOutSine |
| Expo |  easeInExpo |
 easeOutExpo |
 easeInOutExpo |
| Circ |  easeInCirc |
 easeOutCirc |
 easeInOutCirc |
| Back |  easeInBack |
 easeOutBack |
 easeInOutBack |
| Bounce |  easeInBounce |
 easeOutBounce |
 easeInOutBounce |
| Elastic |  easeInElastic |
 easeOutElastic |
 easeInOutElastic |
Installation
composer require smnandre/easing-functions
Usage
Easing\Functions::easeOutCubic(0); // 0 Easing\Functions::easeOutCubic(0.5); // 0.875 $values = array_map(Easing\Functions::easeOutCubic(...), range(0, 1, 0.1)); echo implode(" ", $values); // 0 0.271 0.488 0.657 0.784 0.875 0.936 0.973 0.992 0.999 1
Functions
Easing Functions
| Name | Formulae | Preview |
|---|---|---|
easeOutCubic |
$1 - pow(1 - x, 3)$ |  |
easeInOutCubic |
$x < 0.5 ? 4 * pow(x, 3) : 1 - pow(-2 * x + 2, 3) / 2$ |  |
easeInQuart |
$pow(x, 4)$ |  |
easeOutQuart |
$1 - pow(1 - x, 4)$ |  |
easeInOutQuart |
$x < 0.5 ? 8 * pow(x, 4) : 1 - pow(-2 * x + 2, 4) / 2$ |  |
easeInCubic |
$pow(x, 3)$ |  |
easeInQuad |
$x * x$ |  |
easeOutQuad |
$1 - (1 - x) * (1 - x)$ |  |
easeInOutQuad |
$x < 0.5 ? 2 * x * x : 1 - pow(-2 * x + 2, 2) / 2$ |  |
easeInQuint |
$pow(x, 5)$ |  |
easeOutQuint |
$1 - pow(1 - x, 5)$ |  |
easeInOutQuint |
$x < 0.5 ? 16 * pow(x, 5) : 1 - pow(-2 * x + 2, 5) / 2$ |  |
easeInSine |
$1 - cos((x * pi()) / 2)$ |  |
easeOutSine |
$sin((x * pi()) / 2)$ |  |
easeInOutSine |
$-(cos(pi() * x) - 1) / 2$ |  |
easeInExpo |
$x == 0 ? 0 : pow(2, 10 * x - 10)$ |  |
easeOutExpo |
$x == 1 ? 1 : 1 - pow(2, -10 * x)$ |  |
easeInOutExpo |
$x == 0 ? 0 : x == 1 ? 1 : x < 0.5 ? pow(2, 20 * x - 10) / 2 : (2 - pow(2, -20 * x + 10)) / 2$ |  |
easeInCirc |
$1 - sqrt(1 - pow(x, 2))$ |  |
easeOutCirc |
$sqrt(1 - pow(x - 1, 2))$ |  |
easeInOutCirc |
$x < 0.5 ? (1 - sqrt(1 - pow(2 * x, 2))) / 2 : (sqrt(1 - pow(-2 * x + 2, 2)) + 1) / 2$ |  |
easeInBack |
$2.70158 * pow(x, 3) - 1.70158 * pow(x, 2)$ |  |
easeOutBack |
$1 + 2.70158 * pow(x - 1, 3) + 1.70158 * pow(x - 1, 2)$ |  |
easeInOutBack |
$x < 0.5 ? (pow(2 * x, 2) * ((3.59258 * 2 * x) - 2.59258)) / 2 : (pow(2 * x - 2, 2) * ((3.59258 * (x * 2 - 2)) + 2.59258) + 2) / 2$ |  |
easeInBounce |
$1 - easeOutBounce(1 - x)$ |  |
easeOutBounce |
See bounceOut function |
 |
easeInOutBounce |
$x < 0.5 ? (1 - easeOutBounce(1 - 2 * x)) / 2 : (1 + easeOutBounce(2 * x - 1)) / 2$ |  |
easeInElastic |
$x == 0 ? 0 : x == 1 ? 1 : -pow(2, 10 * x - 10) * sin((x * 10 - 10.75) * ((2 * pi()) / 3))$ |  |
easeOutElastic |
$x == 0 ? 0 : x == 1 ? 1 : pow(2, -10 * x) * sin((x * 10 - 0.75) * ((2 * pi()) / 3)) + 1$ |  |
easeInOutElastic |
$x == 0 ? 0 : x == 1 ? 1 : x < 0.5 ? -(pow(2, 20 * x - 10) * sin((20 * x - 11.125) * ((2 * pi()) / 4.5))) / 2 : (pow(2, -20 * x + 10) * sin((20 * x - 11.125) * ((2 * pi()) / 4.5))) / 2 + 1$ |  |
License
This project is licensed under the MIT License. See the LICENSE file for more information.
smnandre/easing-functions 适用场景与选型建议
smnandre/easing-functions 是一款 基于 PHP 开发的 Composer 扩展包，目前已累计 3 次下载、GitHub Stars 达 3， 最近一次更新时间为 2025 年 01 月 19 日， 在 PHP 生态内属于活跃度较高的组件。
它主要适用于以下技术方向： 「interpolation」 「transition」 「functions」 「animation」 「easing」 「timing」 等业务场景。在实际项目中，围绕这些方向常见需要落地的问题包括：接口对接、性能调优、并发安全、与既有框架（Laravel / ThinkPHP / Yii / Webman 等）的兼容适配，以及生产环境的日志埋点与稳定性保障。
我们在过去多个企业项目中使用过 smnandre/easing-functions 或与其功能相近的方案，如果你在选型或落地过程中遇到问题，例如 版本兼容、二次改造、私有化封装、与内部系统对接、生产 BUG 排查，欢迎联系我们协助评估。
基于 smnandre/easing-functions 在你已有业务上做功能扩展、字段裁剪、UI 适配、与内部账号 / 权限 / 日志系统的深度对接。
线上偶发问题、内存泄漏、慢查询、并发异常等排查修复；针对高流量场景做缓存、队列、索引层面的调优。
承接完整的项目从需求 → 设计 → 开发 → 上线 → 长期运维；也可按月提供技术保姆服务。
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统计信息
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其他信息
- 授权协议： MIT
- 更新时间： 2025-01-19