PHP converts string to uppercase function strtoupper()

Example

Convert all characters to uppercase:

Definition and usage

strtoupper() function converts a string to uppercase.

Note: This function is binary safe.

Related functions:

• strtolower() - Convert the string to lowercase

• lcfirst() - Convert the string to lowercase Convert the first character in the string to lowercase

• ucfirst() - Convert the first character in the string to uppercase

• ucwords() - Convert the first character in the string to uppercase Convert the first character of each word in the string to uppercase

Syntax

strtoupper(string)

Technical details

public function set_kw($kw){ $_intAsc=ord(substr($kw,0,1)); if(($_intAsc>64 and $_intAsc<91)or($_intAsc>96 and $_intAsc<123)){ $this->set_query_q('pinyin:'.strtoupper($kw).'*'); }else{ $this->set_dismax_model(); $this->set_query_q($kw); $this->set_query_qf("name^10 address^5"); } }

The above is the detailed content of PHP converts string to uppercase function strtoupper(). For more information, please follow other related articles on the PHP Chinese website!