PHP converts string to uppercase function strtoupper()

Example

Convert all characters to uppercase:

<?php
echo strtoupper("Hello WORLD!");
?>

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)

Parameters	Description
string	Required. Specifies the string to be converted.

Technical details

Return value:	Returns the string converted to uppercase.
PHP version:	4+

## The strtoupper() function converts the string to uppercase

 public function set_kw($kw){
        $_intAsc=ord(substr($kw,0,1));
        if(($_intAsc>64 and $_intAsc<91)or($_intAsc>96 and $_intAsc<123)){
            $this->set_query_q(&#39;pinyin:&#39;.strtoupper($kw).&#39;*&#39;);
        }else{
            $this->set_dismax_model();
            $this->set_query_q($kw);
            $this->set_query_qf("name^10 address^5");
        }
    }

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