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13b791c79c
Make the behavior of substr(), mb_substr(), iconv_substr() and grapheme_substr() consistent when it comes to the handling of out of bounds offsets. substr() will now always clamp out of bounds offsets to the string boundary. Cases that previously returned false will now return an empty string. This means that substr() itself *always* returns a string now (like mb_substr() already did before.) Closes GH-6182.
195 lines
4.0 KiB
PHP
195 lines
4.0 KiB
PHP
--TEST--
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Testing substr() function
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--FILE--
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<?php
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$strings_array = array( NULL, "", 12345, "abcdef", "123abc", "_123abc");
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$counter = 1;
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foreach ($strings_array as $str) {
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/* variations with two arguments */
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/* start values >, < and = 0 */
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echo ("\n--- Iteration ".$counter." ---\n");
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echo ("\n-- Variations for two arguments --\n");
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var_dump ( substr($str, 1) );
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var_dump ( substr($str, 0) );
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var_dump ( substr($str, -2) );
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/* variations with three arguments */
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/* start value variations with length values */
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echo ("\n-- Variations for three arguments --\n");
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var_dump ( substr($str, 1, 3) );
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var_dump ( substr($str, 1, 0) );
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var_dump ( substr($str, 1, -3) );
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var_dump ( substr($str, 0, 3) );
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var_dump ( substr($str, 0, 0) );
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var_dump ( substr($str, 0, -3) );
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var_dump ( substr($str, -2, 3) );
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var_dump ( substr($str, -2, 0 ) );
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var_dump ( substr($str, -2, -3) );
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$counter++;
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}
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/* variation of start and length to point to same element */
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echo ("\n*** Testing for variations of start and length to point to same element ***\n");
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var_dump (substr("abcde" , 2, -2) );
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var_dump (substr("abcde" , -3, -2) );
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/* Testing to return empty string when start denotes the position beyond the truncation (set by negative length) */
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echo ("\n*** Testing for start > truncation ***\n");
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var_dump (substr("abcdef" , 4, -4) );
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/* String with null character */
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echo ("\n*** Testing for string with null characters ***\n");
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var_dump (substr("abc\x0xy\x0z" ,2) );
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/* String with international characters */
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echo ("\n*** Testing for string with international characters ***\n");
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var_dump (substr('\xIñtërnâtiônàlizætiøn',3) );
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/* start <0 && -start > length */
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echo "\n*** Start before the first char ***\n";
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var_dump (substr("abcd" , -8) );
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/* Omitting length and passing a NULL length */
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echo "\n*** Omitting length or using NULL length ***\n";
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var_dump (substr("abcdef" , 2) );
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var_dump (substr("abcdef" , 2, NULL) );
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echo"\nDone";
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?>
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--EXPECT--
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--- Iteration 1 ---
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-- Variations for two arguments --
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string(0) ""
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string(0) ""
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string(0) ""
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-- Variations for three arguments --
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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--- Iteration 2 ---
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-- Variations for two arguments --
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string(0) ""
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string(0) ""
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string(0) ""
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-- Variations for three arguments --
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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string(0) ""
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--- Iteration 3 ---
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-- Variations for two arguments --
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string(4) "2345"
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string(5) "12345"
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string(2) "45"
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-- Variations for three arguments --
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string(3) "234"
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string(0) ""
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string(1) "2"
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string(3) "123"
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string(0) ""
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string(2) "12"
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string(2) "45"
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string(0) ""
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string(0) ""
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--- Iteration 4 ---
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-- Variations for two arguments --
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string(5) "bcdef"
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string(6) "abcdef"
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string(2) "ef"
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-- Variations for three arguments --
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string(3) "bcd"
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string(0) ""
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string(2) "bc"
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string(3) "abc"
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string(0) ""
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string(3) "abc"
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string(2) "ef"
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string(0) ""
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string(0) ""
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--- Iteration 5 ---
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-- Variations for two arguments --
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string(5) "23abc"
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string(6) "123abc"
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string(2) "bc"
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-- Variations for three arguments --
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string(3) "23a"
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string(0) ""
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string(2) "23"
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string(3) "123"
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string(0) ""
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string(3) "123"
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string(2) "bc"
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string(0) ""
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string(0) ""
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--- Iteration 6 ---
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-- Variations for two arguments --
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string(6) "123abc"
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string(7) "_123abc"
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string(2) "bc"
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-- Variations for three arguments --
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string(3) "123"
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string(0) ""
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string(3) "123"
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string(3) "_12"
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string(0) ""
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string(4) "_123"
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string(2) "bc"
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string(0) ""
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string(0) ""
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*** Testing for variations of start and length to point to same element ***
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string(1) "c"
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string(1) "c"
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*** Testing for start > truncation ***
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string(0) ""
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*** Testing for string with null characters ***
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string(6) "c xy z"
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*** Testing for string with international characters ***
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string(26) "ñtërnâtiônàlizætiøn"
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*** Start before the first char ***
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string(4) "abcd"
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*** Omitting length or using NULL length ***
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string(4) "cdef"
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string(4) "cdef"
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Done
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