mirror of
https://github.com/danog/psalm.git
synced 2024-12-05 13:10:49 +01:00
40 lines
747 B
Markdown
40 lines
747 B
Markdown
# PossiblyFalseOperand
|
|
|
|
Emitted when using a possibly `false` value as part of an operation (e.g. `+`, `.`, `^` etc).
|
|
|
|
```php
|
|
<?php
|
|
|
|
function echoCommaPosition(string $str) : void {
|
|
echo 'The comma is located at ' . strpos($str, ',');
|
|
}
|
|
```
|
|
|
|
## How to fix
|
|
|
|
You can detect the `false` value with some extra logic:
|
|
|
|
```php
|
|
<?php
|
|
|
|
function echoCommaPosition(string $str) : void {
|
|
$pos = strpos($str, ',');
|
|
|
|
if ($pos === false) {
|
|
echo 'There is no comma in the string';
|
|
}
|
|
|
|
echo 'The comma is located at ' . $pos;
|
|
}
|
|
```
|
|
|
|
Alternatively you can just use a ternary to suppress this issue:
|
|
|
|
```php
|
|
<?php
|
|
|
|
function echoCommaPosition(string $str) : void {
|
|
echo 'The comma is located at ' . (strpos($str, ',') ?: '');
|
|
}
|
|
```
|