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Set/Get substitution character (PHP 4 >= 4.0.6, PHP 5)
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".

Example 1408. mb_substitute_character() example

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

/* Set hex format */

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