(No version information available, might be only in CVS)
unicode_set_subst_char — Set the substitution character for string conversion errors
When converting a string from or to unicode, an invalid or unconvertable character may be encountered. When the conversion error mode is set to U_CONV_ERROR_SUBST, the character that caused the error is substituted by a character set by this function. The default substitution character is ?.
The substitution character to use.
Returns TRUE on success or FALSE on failure.
Emits a E_WARNING level error if character is invalid.
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.