PHP comparisons
You entered:
results
| isset() | no | ||||||
|---|---|---|---|---|---|---|---|
| !isset() | yes | ||||||
| 0 | 1 | "" | "0" | "1" | true | false | |
| = = | yes | no | yes | no | no | no | yes |
| = = = | no | no | no | no | no | no | no |
| != | no | yes | no | yes | yes | yes | no |
| ! = = | yes | yes | yes | yes | yes | yes | yes |
| isset() | no | ||||||
|---|---|---|---|---|---|---|---|
| !isset() | yes | ||||||
| 0 | 1 | "" | "0" | "1" | true | false | |
| = = | yes | no | yes | no | no | no | yes |
| = = = | no | no | no | no | no | no | no |
| != | no | yes | no | yes | yes | yes | no |
| ! = = | yes | yes | yes | yes | yes | yes | yes |