PHP Course Summary 20161212

Today's course, the teacher mainly introduces the use of String functions, as well as the relevant contents of the escape character.

First, summary

1. Escape character "\"

(1) Role: In the PHP language there are some symbols with special meaning, such as {"," ", \, $}, we can use the escape character to restore the nature of its ordinary characters, style:" \ symbol itself. "

(2) Single quotes: Escape characters can only escape the single quotation mark and the escape character itself, and do not recognize the variable.

(3) in double quotes: You can escape all special characters and identify variables.

In the 2.PHP language, the string connector is: "."

3. String functions learned today: (1) explode (common), (2) implode (Common), (3) Ucfirst,lcfirst, (4) Trim, (5) sha1,md5 (Common), (6) printf, (7) Str_ Repeat (commonly used); (8) Str_replace; (9) Str_shuffle; (ten) strcasecmp; (one) strip_tags (common); () Stripos () 0; () strlen (commonly used) ; (+) substr (Common)

Second, the string function usage rules

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PHP Course Summary 20161212