PHP bug #78919

config.m4

PHP_ARG_ENABLE(rinit_error, whether to enable rinit_error support,
[  --enable-rinit_error          Enable rinit_error support], no)

if test "$PHP_RINIT_ERROR" != "no"; then
  AC_DEFINE(HAVE_RINIT_ERROR, 1, [ Have rinit_error support ])

  PHP_NEW_EXTENSION(rinit_error, rinit_error.c, $ext_shared)
fi

Dockerfile

FROM php:7.2.25

ADD config.m4 php_rinit_error.h rinit_error.c /opt/rinit_error/
RUN cd /opt/rinit_error && phpize && ./configure && make -j install && make clean

ADD index.php /var/www/html

CMD ["php", "-S", "0.0.0.0:8080", "-d", "memory_limit=2m", \
     "-d", "extension=rinit_error.so", "index.php"]

index.php

<?php phpinfo();

php_rinit_error.h

/* rinit_error extension for PHP */

#ifndef PHP_RINIT_ERROR_H
# define PHP_RINIT_ERROR_H

extern zend_module_entry rinit_error_module_entry;
# define phpext_rinit_error_ptr &rinit_error_module_entry

# define PHP_RINIT_ERROR_VERSION "0.1.0"

# if defined(ZTS) && defined(COMPILE_DL_RINIT_ERROR)
ZEND_TSRMLS_CACHE_EXTERN()
# endif

#endif	/* PHP_RINIT_ERROR_H */

rinit_error.c

/* rinit_error extension for PHP */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "php.h"
#include "php_rinit_error.h"
#include <main/SAPI.h>

/* {{{ PHP_RINIT_FUNCTION
 */
PHP_RINIT_FUNCTION(rinit_error)
{
#if defined(ZTS) && defined(COMPILE_DL_RINIT_ERROR)
	ZEND_TSRMLS_CACHE_UPDATE();
#endif

#define CT_HEADER "Content-type: text/plain"
    sapi_header_line line = { .line = CT_HEADER, .line_len = strlen(CT_HEADER) };
    (void) sapi_header_op(SAPI_HEADER_REPLACE, &line TSRMLS_CC);

    SG(sapi_headers).http_response_code = 200;

#define BODY "OK\r\n"
    (void) php_output_write(BODY, strlen(BODY) TSRMLS_CC);

	zend_error_noreturn(E_ERROR, "Failing RINIT");
	return SUCCESS;
}
/* }}} */

/* {{{ rinit_error_functions[]
 */
static const zend_function_entry rinit_error_functions[] = {
	PHP_FE_END
};
/* }}} */

/* {{{ rinit_error_module_entry
 */
zend_module_entry rinit_error_module_entry = {
	STANDARD_MODULE_HEADER,
	"rinit_error",					/* Extension name */
	rinit_error_functions,			/* zend_function_entry */
	NULL,							/* PHP_MINIT - Module initialization */
	NULL,							/* PHP_MSHUTDOWN - Module shutdown */
	PHP_RINIT(rinit_error),			/* PHP_RINIT - Request initialization */
	NULL,							/* PHP_RSHUTDOWN - Request shutdown */
	NULL,							/* PHP_MINFO - Module info */
	PHP_RINIT_ERROR_VERSION,		/* Version */
	STANDARD_MODULE_PROPERTIES
};
/* }}} */

#ifdef COMPILE_DL_RINIT_ERROR
# ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE()
# endif
ZEND_GET_MODULE(rinit_error)
#endif