php的 strstr() 函数效率高吗？该如何处理
php的 strstr() 函数效率高吗？
我是新手，要做一个要用到匹配字符串的项目，效率要求比较高，php里自带的strstr算法效率高不？里面只是用kmp算法吗？有没有用sunday算法的?
------解决方案--------------------
我只知道php的内置函数还行。难道你想用自定义函数来做？
------解决方案--------------------
str* 类的函数，总体来说比正则快。
------解决方案--------------------
查找且需要得到字符串，用strstr效率很高。只是查找存在与否不需要得到字符串，用strpos效率最高。
------解决方案--------------------
字符串查找函数肯定比正则类的效率要高。 这个strstr()又是效率非常高的一个。而且该函数是二进制安全的。
------解决方案--------------------
不很清楚 strstr 内部实现时的算法，不过你可以查看该函数的源码
除非你用 c 来写，否则自定义函数不可能高于内置函数
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