1--TEST-- 2Test preg_replace_callback() function : basic functionality 3--FILE-- 4<?php 5/* 6* proto string preg_replace(mixed regex, mixed replace, mixed subject [, int limit [, count]]) 7* Function is implemented in ext/pcre/php_pcre.c 8*/ 9/* 10* Basic test for preg_replace_callback 11*/ 12$replacement = array('zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'); //array will have the default key values (0-9) and each value is the corresponding key written in words. 13function integer_word($matches) { 14 global $replacement; 15 return $replacement[$matches[0]]; //all examples will be looking for an integer value, if one is found it will be stored in $matches[0] which corresponds to a key in the $replacements array 16 17} 18$subject1 = 'there are 7 words in this sentence.'; 19$new_subject1 = preg_replace_callback('/\d/', "integer_word", $subject1); 20print "$new_subject1 \n"; 21$subject2 = '1 2 3 4 is now written in words'; 22$new_subject2 = preg_replace_callback('/\d/', "integer_word", $subject2, 3); //limits to three replacements 23print "$new_subject2 \n"; 24$subject3 = 'there are no numbers in this string'; 25$new_subject3 = preg_replace_callback('/\d/', "integer_word", $subject3, 5, $count); //limites to five replacements and counts the number of replacements made ands stores in $count variable 26print "$new_subject3 \n"; 27print $count; 28?> 29--EXPECT-- 30there are seven words in this sentence. 31one two three 4 is now written in words 32there are no numbers in this string 330 34
