<?php
function is_intstr($val) {
return preg_match("/^(0|[1-9][0-9]*)$/", $val);
}
foreach(range(0, 100) as $n) {
echo $n*$n;
echo " - ";
echo is_intstr($n*$n);
echo "\n";
}
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
- 0 - 1
1 - 1
4 - 1
9 - 1
16 - 1
25 - 1
36 - 1
49 - 1
64 - 1
81 - 1
100 - 1
121 - 1
144 - 1
169 - 1
196 - 1
225 - 1
256 - 1
289 - 1
324 - 1
361 - 1
400 - 1
441 - 1
484 - 1
529 - 1
576 - 1
625 - 1
676 - 1
729 - 1
784 - 1
841 - 1
900 - 1
961 - 1
1024 - 1
1089 - 1
1156 - 1
1225 - 1
1296 - 1
1369 - 1
1444 - 1
1521 - 1
1600 - 1
1681 - 1
1764 - 1
1849 - 1
1936 - 1
2025 - 1
2116 - 1
2209 - 1
2304 - 1
2401 - 1
2500 - 1
2601 - 1
2704 - 1
2809 - 1
2916 - 1
3025 - 1
3136 - 1
3249 - 1
3364 - 1
3481 - 1
3600 - 1
3721 - 1
3844 - 1
3969 - 1
4096 - 1
4225 - 1
4356 - 1
4489 - 1
4624 - 1
4761 - 1
4900 - 1
5041 - 1
5184 - 1
5329 - 1
5476 - 1
5625 - 1
5776 - 1
5929 - 1
6084 - 1
6241 - 1
6400 - 1
6561 - 1
6724 - 1
6889 - 1
7056 - 1
7225 - 1
7396 - 1
7569 - 1
7744 - 1
7921 - 1
8100 - 1
8281 - 1
8464 - 1
8649 - 1
8836 - 1
9025 - 1
9216 - 1
9409 - 1
9604 - 1
9801 - 1
10000 - 1
- Output for 8.3.5
- Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
0 - 1
1 - 1
4 - 1
9 - 1
16 - 1
25 - 1
36 - 1
49 - 1
64 - 1
81 - 1
100 - 1
121 - 1
144 - 1
169 - 1
196 - 1
225 - 1
256 - 1
289 - 1
324 - 1
361 - 1
400 - 1
441 - 1
484 - 1
529 - 1
576 - 1
625 - 1
676 - 1
729 - 1
784 - 1
841 - 1
900 - 1
961 - 1
1024 - 1
1089 - 1
1156 - 1
1225 - 1
1296 - 1
1369 - 1
1444 - 1
1521 - 1
1600 - 1
1681 - 1
1764 - 1
1849 - 1
1936 - 1
2025 - 1
2116 - 1
2209 - 1
2304 - 1
2401 - 1
2500 - 1
2601 - 1
2704 - 1
2809 - 1
2916 - 1
3025 - 1
3136 - 1
3249 - 1
3364 - 1
3481 - 1
3600 - 1
3721 - 1
3844 - 1
3969 - 1
4096 - 1
4225 - 1
4356 - 1
4489 - 1
4624 - 1
4761 - 1
4900 - 1
5041 - 1
5184 - 1
5329 - 1
5476 - 1
5625 - 1
5776 - 1
5929 - 1
6084 - 1
6241 - 1
6400 - 1
6561 - 1
6724 - 1
6889 - 1
7056 - 1
7225 - 1
7396 - 1
7569 - 1
7744 - 1
7921 - 1
8100 - 1
8281 - 1
8464 - 1
8649 - 1
8836 - 1
9025 - 1
9216 - 1
9409 - 1
9604 - 1
9801 - 1
10000 - 1
preferences:
343.08 ms | 403 KiB | 453 Q