Learning PHP Notes String Processing_PHP Tutorial

substr();

substr(str,start,length);

Example: substr('php is very good language',4,5);

The output is is ve;

When start>str length, the return is ();

substr('php is very good language',26,5);

substr('php is very good language',4);

The output is (blank)

The output is is v (indicating that both start and langth are 4)

When start is a negative value, start reading from the end of str (*In this case, it starts reading from -1, not from 0),

substr('php is very good language ',-4,5);

The output is uage

When length is a negative value, length means reading from the end and intercepting the end position of str.

substr('php is very good language',4,-5);

The output is is very good lan

explode() puts the function string Split into arrays;

strrev() sets the function string

setlocalhost(content location) to set the local environment.content and specify the scene information constants that need to be set. There are (

LC_ALL - constants for all subordinates
LC_COLLATE - sort order
LC_CTYPE - character classification and conversion (for example: convert all characters to lowercase or uppercase)
LC_MESSAGES - system Information format
LC_MONETARY - currency/currency format
LC_NUMERIC - numerical format
LC_TIME - date and time format
); location, set the country area, for example, chs.

strftime( ) formats local time/date according to locale settings.

http://www.bkjia.com/PHPjc/322518.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/322518.htmlTechArticlesubstr(); substr(str,start,length); Example: substr('php is very good language' ,4,5); The output is is ve; When the length of startstr, the return is (); substr('php is very good language',...