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。
An example of a library function that does not have an associated system call is the strlen function declared in string.h.
没有相关系统调用的库函数的一个示例是string . h中声明的strlen函数。
If no width argument is given, the appropriate width is autocomputed from the comment argument itself (strlen(a:comment)+2).
如果没有提供宽度参数，那么将自动根据注释参数本身计算相应的宽度（strlen(a:comment)+2）。
But, if you also wanted to use the standard PHP strlen function (say, within your own strlen implementation), you'd need to precede the function invocation with a backslash, as Listing 10 shows.
但是，如果也希望使用标准的PHPstrlen函数(比如在自己的strlen实现内部)，就需要在函数调用前面加上反斜杠，见清单10。
But, if you also wanted to use the standard PHP strlen function (say, within your own strlen implementation), you'd need to precede the function invocation with a backslash, as Listing 10 shows.
但是，如果也希望使用标准的PHPstrlen函数(比如在自己的strlen实现内部)，就需要在函数调用前面加上反斜杠，见清单10。
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