Question

utf8_uri_encode( string $utf8_string,  int $length )

Encode the Unicode values to be used in the URI.

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description

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参数

$utf8_string

(string) (Required)

$length

(int) (Required) Max length of the string

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返回值

(string) String with Unicode encoded for URI.

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源代码

File: wp-includes/formatting.php

function utf8_uri_encode( $utf8_string, $length = 0 ) {
	$unicode = '';
	$values = array();
	$num_octets = 1;
	$unicode_length = 0;

	mbstring_binary_safe_encoding();
	$string_length = strlen( $utf8_string );
	reset_mbstring_encoding();

	for ($i = 0; $i < $string_length; $i++ ) {

		$value = ord( $utf8_string[ $i ] );

		if ( $value < 128 ) {
			if ( $length && ( $unicode_length >= $length ) )
				break;
			$unicode .= chr($value);
			$unicode_length++;
		} else {
			if ( count( $values ) == 0 ) {
				if ( $value < 224 ) {
					$num_octets = 2;
				} elseif ( $value < 240 ) {
					$num_octets = 3;
				} else {
					$num_octets = 4;
				}
			}

			$values[] = $value;

			if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length )
				break;
			if ( count( $values ) == $num_octets ) {
				for ( $j = 0; $j < $num_octets; $j++ ) {
					$unicode .= '%' . dechex( $values[ $j ] );
				}

				$unicode_length += $num_octets * 3;

				$values = array();
				$num_octets = 1;
			}
		}
	}

	return $unicode;
}

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更新日志

Version	description
1.5.0	Introduced.

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相关函数

Uses

• wp-includes/functions.php: mbstring_binary_safe_encoding()
• wp-includes/functions.php: reset_mbstring_encoding()

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Used By

• wp-includes/formatting.php: sanitize_title_with_dashes()
• wp-includes/post.php: _truncate_post_slug()

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User Contributed Notes