strlen

So strlen is the length of a string.

所以strlen就是字符串的长度。

A common use of strlen is to estimate display-width.

strlen的一种常见用法是估算显示宽度。

You may receive error messages about strcasecmp as well as about strlen being undeclared.

您可能会收到有关strcasecmp以及strlen未声明的错误消息。

First, I´m going to do a sanity check strlen so we´ve used string length, strlen, before.

首先，我先做一个检查，我们以前使用过字符串长度函数。

So, for example, if you´ve coded your own strlen function, PHP would resolve to your function.

例如，如果您编写了自己的strlen函数，php会解析出您的函数。