The "-h" option of phpdbg misses an option "z".

• For the option "z", the following code appears during option parsing and modifies the zend_extensions_len and zend_extensions in sapi/phpdbg/phpdbg.c:1437-1443 for version 8.0.23.

			case 'z':
				zend_extensions_len++;
				if (zend_extensions) {
					zend_extensions = realloc(zend_extensions, sizeof(char*) * zend_extensions_len);
				} else zend_extensions = malloc(sizeof(char*) * zend_extensions_len);
				zend_extensions[zend_extensions_len-1] = strdup(php_optarg);
			break;

But it does not appear in the document provided by "-h".

It may prevent users from using the relevant function.