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--TEST--
str_decrement(): Decrementing various strings
--FILE--
<?php
$strictlyAlphaNumeric = [
"Az",
"aZ",
"A9",
"a9",
// Carrying values until the beginning of the string (no underflow)
"Za",
"zA",
"Z0",
"z0",
// Underflow, removing leading character
"Aa",
"aA",
"A0",
"a0",
"10",
"1A",
"1a",
"10a",
// string interpretable as a number in scientific notation
"5e6",
// Interned strings
"d",
"D",
"4",
"1",
];
foreach ($strictlyAlphaNumeric as $s) {
var_dump(str_decrement($s));
var_dump($s);
}
?>
--EXPECT--
string(2) "Ay"
string(2) "Az"
string(2) "aY"
string(2) "aZ"
string(2) "A8"
string(2) "A9"
string(2) "a8"
string(2) "a9"
string(2) "Yz"
string(2) "Za"
string(2) "yZ"
string(2) "zA"
string(2) "Y9"
string(2) "Z0"
string(2) "y9"
string(2) "z0"
string(1) "z"
string(2) "Aa"
string(1) "Z"
string(2) "aA"
string(1) "9"
string(2) "A0"
string(1) "9"
string(2) "a0"
string(1) "9"
string(2) "10"
string(1) "Z"
string(2) "1A"
string(1) "z"
string(2) "1a"
string(2) "9z"
string(3) "10a"
string(3) "5e5"
string(3) "5e6"
string(1) "c"
string(1) "d"
string(1) "C"
string(1) "D"
string(1) "3"
string(1) "4"
string(1) "0"
string(1) "1"
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