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# mb_substitute_character

(PHP 4 >= 4.0.6, PHP 5)

mb_substitute_character -- Set/Get substitution character

## Description

mixed mb_substitute_character ( [mixed substrchar] )

mb_substitute_character() specifies substitution character when input character encoding is invalid or character code is not exist in output character encoding. Invalid characters may be substituted `NULL`(no output), string or integer value (Unicode character code value).

This setting affects mb_convert_encoding(), mb_convert_variables(), mb_output_handler(), and mb_send_mail().

substchar : Specify Unicode value as integer or specify as string as follows

- "none" : no output

- "long" : Output character code value (Example: U+3000,JIS+7E7E)

Return Value: If substchar is set, it returns `TRUE` for success, otherwise returns `FALSE`. If substchar is not set, it returns Unicode value or "none"/"long".

Beispiel 1. mb_substitute_character() example

`<?php /* Set with Unicode U+3013 (GETA MARK) */ mb_substitute_character(0x3013); /* Set hex format */ mb_substitute_character("long"); /* Display current setting */ echo mb_substitute_character(); ?>`

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