Reproduce code:
---------------

<?php

	$colour;
	$num; 

	echo "Test 1: zend_hash_apply with stop colour red \n";
	init_array();
	iterate_until_red($colour); 
	check_array(1);
 
	echo "Test 2: zend_hash_apply_with_argument with stop colour prurple \n";
	init_array();
	iterate_until($colour, "purple"); 
	check_array(2);
 
	echo "Test 3: zend_hash_apply_with_arguments with stop colours yellow and black \n";
	init_array();
	iterate_until_either($colour, "yellow", "black"); 
	check_array(3);
  
	function init_array()
	{
		global $colour, $num;
		$colour = array("orange", "green", "blue", "red", "yellow", "purple", "indigo");
		$num = count($colour);
	}
 
	function check_array($test)
	{
		global $colour, $num;
	
 		echo "Array contents after test:  "; 
 		foreach ($colour as $val) {
 			$i++;
 			echo "$val ";
		}
 
 		if ($num == count($colour)) {
 			echo "\nTEST $test PASSED\n\n\n";
		} else {
 			echo "\nTEST $test FAILED\n\n\n";
		}	
	}
?>



which uses the following simple extension


----------------  hashapitest.h --------------

#ifndef PHP_HASHAPITEST_H
/* Prevent double inclusion */
#define PHP_HASHAPITEST_H

/* Define Extension Properties */
#define PHP_HASHAPITEST_EXTNAME    "hashapitest"
#define PHP_HASHAPITEST_EXTVER    "1.0"


#define PHP_HASHAPITEST_DESCRIPTOR_RES_NAME "File Descriptor"

/* Import configure options
   when building outside of
   the PHP source tree */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/* Include PHP Standard Header */
#include "php.h"
#include "stdio.h"

/* Define the entry point symbol
 * Zend will use when loading this module
 */
extern zend_module_entry hashapitest_module_entry;
#define phpext_hashapitest_ptr &hashapitest_module_entry

#endif /* PHP_HASHAPITEST_H */

-------------  end of hashapitest.h -------------------

and 

--------------  hashapitest.c ---------------------


#include "hashapitest.h"

int stop_on_red(zval **val TSRMLS_DC)
{
    int ret = ZEND_HASH_APPLY_KEEP;

    zval tmpcopy = **val;
    zval_copy_ctor(&tmpcopy);
    INIT_PZVAL(&tmpcopy);
    convert_to_string(&tmpcopy);

    php_printf("Stop_on_red called for element: ");
    PHPWRITE(Z_STRVAL(tmpcopy), Z_STRLEN(tmpcopy));
    php_printf("\n");

   /* Check for STOP condition */
    if (!strcmp(Z_STRVAL(tmpcopy), "red")) {
       return ZEND_HASH_APPLY_STOP;
    }

    zval_dtor(&tmpcopy);
    return ret;
}

int stop_on_colour(zval **val, char *colour TSRMLS_DC)
{
    int ret = ZEND_HASH_APPLY_KEEP;
    
    zval tmpcopy = **val;
    zval_copy_ctor(&tmpcopy);
    INIT_PZVAL(&tmpcopy);
    convert_to_string(&tmpcopy);


    php_printf("Stop_on_colour called for element:");
    PHPWRITE(Z_STRVAL(tmpcopy), Z_STRLEN(tmpcopy));
    php_printf("\n");

    /* Check for STOP condition */
    if (!strcmp(Z_STRVAL(tmpcopy), colour)) {
       ret = ZEND_HASH_APPLY_STOP;
    }

    zval_dtor(&tmpcopy);
    return ret;
}

int stop_on_either_colour(zval **val, int num_args, va_list args, zend_hash_key *hash_key)
{
    int ret = ZEND_HASH_APPLY_KEEP;
    char *colour1= va_arg(args, char*);
    char *colour2= va_arg(args, char*);

    TSRMLS_FETCH();
    zval tmpcopy = **val;
    zval_copy_ctor(&tmpcopy);
    INIT_PZVAL(&tmpcopy);
    convert_to_string(&tmpcopy);

    php_printf("Stop_on_either_colour called for element: ");
    PHPWRITE(Z_STRVAL(tmpcopy), Z_STRLEN(tmpcopy));
    php_printf("\n");

    /* Check for STOP condition */
    if (!strcmp(Z_STRVAL(tmpcopy), colour1)|| !strcmp(Z_STRVAL(tmpcopy), colour2)) {
        ret = ZEND_HASH_APPLY_STOP;
    }

    zval_dtor(&tmpcopy);
    return ret;
}

PHP_FUNCTION(iterate_until_red)
{
    zval *array;
    HashTable *arrayht = NULL;
    int arg1 = 99;
    char *arg2 = "red";
    
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &array) == FAILURE) {
        RETURN_NULL();
    }
    if (Z_TYPE_P(array) != IS_ARRAY) {
        php_error_docref(NULL TSRMLS_CC, E_NOTICE,
               "<p>iterate_until_red called on non-array zval<p/>");
        return;
    }

    arrayht =  Z_ARRVAL_P(array);
    zend_hash_apply(arrayht, stop_on_red TSRMLS_CC);
    return;
}

PHP_FUNCTION(iterate_until)
{
    zval *array;
    HashTable *arrayht = NULL;
    char *stop_colour;
    int stop_colour_len;
    
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zs", &array, &stop_colour, &stop_colour_len) == FAILURE) {
        RETURN_NULL();
    }
    if (Z_TYPE_P(array) != IS_ARRAY) {
        php_error_docref(NULL TSRMLS_CC, E_NOTICE,
               "<p>iterate_until called on non-array zval<p/>");
        return;
    }

    arrayht =  Z_ARRVAL_P(array);
    zend_hash_apply_with_argument(arrayht, stop_on_colour, stop_colour TSRMLS_CC);
    return;
}

PHP_FUNCTION(iterate_until_either)
{
    zval *array;
    HashTable *arrayht = NULL;
    char *stop_colour1, *stop_colour2;
    int stop_colour1_len, stop_colour2_len;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zss", &array, &stop_colour1, &stop_colour1_len, &stop_colour2, &stop_colour2_len) == FAILURE) {
        RETURN_NULL();
    }
    if (Z_TYPE_P(array) != IS_ARRAY) {
        php_error_docref(NULL TSRMLS_CC, E_NOTICE,
               "<p>iterate_until_either called on non-array zval<p/>");
        return;
    }

    arrayht =  Z_ARRVAL_P(array);
    zend_hash_apply_with_arguments(arrayht, stop_on_either_colour, 2, stop_colour1, stop_colour2);
    return;
}

                    
static function_entry php_hashapitest_functions[] = {
    PHP_FE(iterate_until_red, NULL)
    PHP_FE(iterate_until, NULL)
    PHP_FE(iterate_until_either, NULL)
    { NULL, NULL, NULL }
};


zend_module_entry hashapitest_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
     STANDARD_MODULE_HEADER,
#endif
    PHP_HASHAPITEST_EXTNAME,
    php_hashapitest_functions, /* Functions */
    NULL,  /* MINIT */
    NULL, /* MSHUTDOWN */
    NULL, /* RINIT */
    NULL, /* RSHUTDOWN */
    NULL, /* MINFO */
#if ZEND_MODULE_API_NO >= 20010901
    PHP_HASHAPITEST_EXTVER,
#endif
    STANDARD_MODULE_PROPERTIES
};

#ifdef COMPILE_DL_HASHAPITEST
ZEND_GET_MODULE(hashapitest) 
#endif

--------------  end of hashapitest.c ------------------