e949/api/_utils.php

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<?php
// Utility functions
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// Check if request was to specified file
function Utils_ThisFileIsRequested ($fullpath): bool {
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return substr($fullpath, -strlen($_SERVER["SCRIPT_NAME"])) === $_SERVER["SCRIPT_NAME"];
}
// Generate secure random string
function Utils_GenerateRandomString (int $length, string $keyspace = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"): string {
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if ($length < 1) {
die("cant generate random string of size less than 1");
}
$pieces = [];
$max = mb_strlen($keyspace, "8bit") - 1;
for ($i = 0; $i < $length; ++$i) {
$pieces []= $keyspace[random_int(0, $max)];
}
return implode("", $pieces);
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}
// Get ratio from two values
function Utils_GetRatio ($x, $y) {
if ($x === $y)
return 1;
return max($x, $y) / min($x, $y);
}
// Join two or more paths pieces to single
function Utils_JoinPaths () {
$paths = array();
foreach (func_get_args() as $arg) {
if ($arg !== '') { $paths[] = $arg; }
}
return preg_replace('#/+#','/',join('/', $paths));
}
// Check if string is valid ASCII
function Utils_IsAscii (string $str): bool {
return (bool)!preg_match("/[\\x80-\\xff]+/", $string);
}
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?>