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Core_UTF8::is_ascii

Tests whether a string contains only 7-bit ASCII bytes. This is used to determine when to use native functions or UTF-8 functions.

$ascii = UTF8::is_ascii($str);

boolean Core_UTF8::is_ascii( mixed $str )

参数列表

参数类型描述默认值

$str mixed String or array of strings to check

参数	类型	描述	默认值
`$str`	`mixed`	String or array of strings to check

返回值

boolean

File: ./core/classes/utf8.class.php

public static function is_ascii($str)
{
    if ( is_array($str) )
    {
        $str = implode($str);
    }

    return !preg_match('/[^\x00-\x7F]/S', $str);
}