(PHP 4 >= 4.0.6)

mb_substitute_character -- Set/Get substitution character


mixed mb_substitute_character ([mixed substrchar])


This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change in a future release of PHP without notice. Be warned and use this function at your own risk.

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_detect_encoding() and mb_send_mail().

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

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".

Example 1. mb_substitute_character() example

/* Set with Unicode U+3013 (GETA MARK) */

/* Set hex format */

/* Display current setting */
echo mb_substitute_character();