--TEST--
iconv_substr()
--EXTENSIONS--
iconv
--INI--
iconv.internal_charset=ISO-8859-1
--FILE--
<?php
function hexdump($str) {
    $len = strlen($str);
    for ($i = 0; $i < $len; ++$i) {
        printf("%02x", ord($str[$i]));
    }
    print "\n";
}

function foo($str, $offset, $len, $charset) {
    hexdump(substr($str, $offset, $len));
    hexdump(iconv_substr($str, $offset, $len, $charset));
}

function bar($str, $offset, $len = false) {
    if (is_bool($len)) {
        var_dump(substr($str, $offset));
        var_dump(iconv_substr($str, $offset));
    } else {
        var_dump(substr($str, $offset, $len));
        var_dump(iconv_substr($str, $offset, $len));
    }
}

foo("abcdefghijklmnopqrstuvwxyz", 5, 7, "ASCII");
foo("あいうえおかきくけこさしす", 5, 7, "EUC-JP");
bar("This is a test", 100000);
bar("This is a test", 0, 100000);
bar("This is a test", -3);
bar("This is a test", -3, null);
bar("This is a test", 0, -9);
bar("This is a test", 0, -100000);
bar("This is a test", -9, -100000);
var_dump(iconv("ISO-2022-JP", "EUC-JP", iconv_substr(iconv("EUC-JP", "ISO-2022-JP", "こんにちは ISO-2022-JP"), 3, 8, "ISO-2022-JP")));
?>
--EXPECT--
666768696a6b6c
666768696a6b6c
a6a4a8a4aaa4ab
a4aba4ada4afa4b1a4b3a4b5a4b7
string(0) ""
string(0) ""
string(14) "This is a test"
string(14) "This is a test"
string(3) "est"
string(3) "est"
string(3) "est"
string(3) "est"
string(5) "This "
string(5) "This "
string(0) ""
string(0) ""
string(0) ""
string(0) ""
string(10) "ちは ISO-2"