2021年12月份的TIOBE编程语言排行榜中，PHP跌至十二，多年来首次无缘前十。这份榜单一经公布，顿时引起轩然大波。特别是在PHP界，很多小伙伴纷纷表达伤感之情，颇有哀鸿遍野之势。笔者作为PHP的忠实粉丝之一，自然也不能无动于衷。但我想劝大家不要盲目人云亦云，也许你看了下面的分析之后，就不那么悲观失望了。
一、相对不代表绝对
众所周知，TIOBE是以编程语言的热门程度来排名的。为了便于理解，我们可以把其中的Ratings看成市场占有率，而这种占有率其实是相对的，是不仅仅由语言本身的绝对占有量决定的。比如，假设市场上只有PHP和Python，两者的绝对占有量各是100人，那么这两种语言的市场占有率都是50%。过了一段时间以后，假设PHP的绝对占有量还是100人，而Python由原来的100人增长到了300人。这时我们会发现，虽然PHP的绝对占有量并没有下降，但却一下子跌到了25%。现实情况也是如此，PHP在经历了Web发展时期的快速增长之后，市场的绝对占有量已经趋于稳定。而这时由于大数据、云原生、人工智能等领域的快速兴起，相关语言的绝对占有量必然大幅增长，从而导致PHP相对占有率的下降。但我们应客观看到，PHP本身的发展并没有停滞，市场占有的绝对数量也依然庞大，并且拥有一个非常成熟的良好生态！
二、最贵不代表最配
我们日常购物一般提倡只买对的不买贵的，也就是强调性价比。其实编程语言的选择也是如此，因为每种编程语言往往都是在特定背景下为某些特定场景而生的。比如，PHP语言的诞生是源于Rasmus Lerdorf想要更加方便地管理自己的博客，而个人博客的访问量与企业级项目基本是不在一个量级的，所以它的初衷并不是关注性能，而是为了轻量、简单；Java语言的诞生是源于一群志同道合的小伙伴既想改变C语言在指针、内存管理及可移植性上的不足，又想延续C语言的性能优势及语法习惯，所以它的初衷是想鱼和熊掌兼得，并没有考虑随之衍生的庞大和臃肿。所以，对于中小企业的Web项目来说，在访问压力没有达到一定量级的情况下，PHP和Java的性能差距是微乎其微的。而相同功能的开发难度，Java就要比PHP大多了。所以，对于中小企业来说，单纯追求性能的高大上并非上策，唯有最适合、最匹配才是明智之选！
三、热度不代表厚度
当前，面对Java在互联网大厂的主导地位，面对Go在云原生的天然优势，面对Python在人工智能的如鱼得水，我们很容易被这些潮流热度所左右。当然，如果你是刚刚开始面临选择，将编程语言的热门程度作为重要参考也就无可厚非。但是，如果你已经在PHP领域摸爬滚打了几年甚至更长时间，如果不是工作必须，我认为没有必要完全放弃PHP而重新开始。因为人的精力毕竟是有限的，持续专注某一领域往往比广泛涉猎多个领域取得的专业成就更高。说到这里，你可能要说：编程语言都是相通的，有了PHP基础转到别的语言也是很容易上手的！对此，我只能说，任何两种语言之间都是既有共性又有个性的，这个转换过程总归要付出很多学习成本的。所以，如果你已经在PHP领域颇有心得，我的建议是除非不得已，请继续沉淀你的PHP厚度吧！惠新宸不就是个很好的榜样吗？
我们常说，三百六十行，行行出状元。任何时期，所谓的热门和冷门都是相对的。如果你的知识水平毫无建树，那么再热门的领域对你来说也是冷门；如果你的学术见识出类拔萃，那么再冷门的领域对你来说也是热门！最后，用一首古诗与大家共勉：咬定青山不放松，立根原在破岩中；千磨万击还坚劲，任尔东西南北风！
持续分享IT领域原创作品，关注我吧！
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