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make 'oracles' feature backwards compatible with php 7.4 (#13)

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adds implementations of `str_contains` and `str_starts_with` that are used if the functions are not already defined. this should enable 4get to work on both php 7.4 and php 8.*

my instance is currently on 7.4.33, and you can see the oracles working here:
[calc.php](https://4get.silly.computer/web?s=2%2B4*(2^2))
[encoder.php](https://4get.silly.computer/web?s=md5+hamburger)
[numerics.php](https://4get.silly.computer/web?s=0xf0f0f)
[time.php](https://4get.silly.computer/web?s=what+is+the+time+right+now+tz%253Aest)

Reviewed-on: https://git.lolcat.ca/lolcat/4get/pulls/13
Co-authored-by: cynic <admin@cynic.moe>
Co-committed-by: cynic <admin@cynic.moe>
This commit is contained in:
cynic 2023-09-14 19:10:13 -05:00 committed by lolcat
parent 8762d68466
commit be8546bdf5
2 changed files with 19 additions and 0 deletions
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12
oracles/base.php
View file

@ -21,4 +21,16 @@ abstract class oracle {
return "";
}
}
// backwards compatibility
if (!function_exists('str_starts_with')) {
function str_starts_with($haystack, $needle) {
return strncmp($haystack, $needle, strlen($needle)) === 0;;
}
}
if (!function_exists('str_contains')) {
function str_contains($haystack, $needle) {
return strpos((string)$haystack, (string)$needle) !== false;
}
}
?>

7
oracles/calc.php
View file

@ -84,6 +84,13 @@ class calculator extends oracle {
}
}
// no implicit multiplication
for ($i = 0; $i < count($tokens) - 1; $i++) {
if ($tokens[$i][0] == "n" && $tokens[$i+1] == ["g", "("]) {
return "";
}
}
//strategy:
// traverse to group open (if there is one)
// - return to start with the internals