PHP:iconv_mime_encode()的用法_iconv函数

iconv_mime_encode

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(PHP 5)

iconv_mime_encode — Composes a MIME header field

说明 string iconv_mime_encode ( string $field_name , string $field_value [, array $preferences = NULL ] )

Composes and returns a string that represents a valid MIME header field, which looks like the following: In the above example, "Subject" is the field name and the portion that begins with "=?ISO--1?..." is the field value.

参数

field_name

The field name.

field_value

The field value.

preferences

You can control the behaviour of iconv_mime_encode() by specifying an associative array that contains configuration items to the optional third parameter preferences. The items supported by iconv_mime_encode() are listed below. Note that item names are treated case-sensitive. Configuration items supported by iconv_mime_encode() Item Type Description Default value Example scheme string Specifies the method to encode a field value by. The value of this item may be either "B" or "Q", where "B" stands for base encoding scheme and "Q" stands for quoted-printable encoding scheme. B B input-charset string Specifies the character set in which the first parameter field_name and the second parameter field_value are presented. If not given, iconv_mime_encode() assumes those parameters are presented to it in the iconv.internal_encoding ini setting. iconv.internal_encoding ISO--1 output-charset string Specifies the character set to use to compose the MIME header. iconv.internal_encoding UTF-8 line-length integer Specifies the maximum length of the header lines. The resulting header is "folded" to a set of multiple lines in case the resulting header field would be longer than the value of this parameter, according to »RFC - Internet Message Format. If not given, the length will be limited to characters. line-break-chars string Specifies the sequence of characters to append to each line as an end-of-line sign when "folding" is performed on a long header field. If not given, this defaults to "rn" (CR LF). Note that this parameter is always treated as an ASCII string regardless of the value of input-charset. rn n

返回值

Returns an encoded MIME field on success, or FALSE if an error occurs during the encoding.

范例

Example #1 iconv_mime_encode() example

<?php$preferences=array("input-charset"=>"ISO--1","output-charset"=>"UTF-8","line-length"=>,"line-break-chars"=>"n");$preferences["scheme"]="Q";//Thisyields"Subject:=?UTF-8?Q?Pr=C3=BCfung=Pr=C3=BCfung?="echoiconv_mime_encode("Subject","PrüfungPrüfung",$preferences);$preferences["scheme"]="B";//Thisyields"Subject:=?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?="echoiconv_mime_encode("Subject","PrüfungPrüfung",$preferences);?>

参见

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