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Mark file resource functions as having side effects #698
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ondrejmirtes
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phpstan:master
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jlherren:resource-function-side-effects
Nov 8, 2021
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,68 @@ | ||
<?php | ||
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namespace FilesystemFunctions; | ||
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use function PHPStan\Testing\assertType; | ||
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class Bug5461 | ||
{ | ||
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public function run(): void | ||
{ | ||
$fh = fopen('foo.txt', 'r'); | ||
if ($fh === false) { | ||
throw new \InvalidArgumentException('Could not open file'); | ||
} | ||
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while (!feof($fh)) { | ||
$data = (string)fread($fh, 1024); | ||
assertType('bool', feof($fh)); | ||
} | ||
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fclose($fh); | ||
} | ||
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} | ||
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class MoreTests | ||
{ | ||
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public function test1(): void | ||
{ | ||
if (fopen('foo.txt', 'r') === false) { | ||
assertType('resource|false', fopen('foo.txt', 'r')); | ||
} | ||
} | ||
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/** | ||
* @param resource $fh | ||
*/ | ||
public function test2($fh): void | ||
{ | ||
if (fread($fh, 4) === 'data') { | ||
assertType('string|false', fread($fh, 4)); | ||
} | ||
} | ||
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/** | ||
* @param resource $fh | ||
*/ | ||
public function test3($fh): void | ||
{ | ||
if (ftell($fh) === 0) { | ||
assertType('0', ftell($fh)); | ||
fseek($fh, 10); | ||
assertType('int|false', ftell($fh)); | ||
} | ||
} | ||
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public function test4(string $path): void | ||
{ | ||
if (file_get_contents($path) === 'data') { | ||
assertType('\'data\'', file_get_contents($path)); | ||
file_put_contents($path, 'other'); | ||
assertType('string|false', file_get_contents($path)); | ||
} | ||
} | ||
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} |
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this reminds me of, whether
file_put_contents
andfile_get_contents
is missing in this list?There was a problem hiding this comment.
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I only included the functions that work on file handles. But I guess all filesystem operations probably should be added. In that case it should also include
unlink()
,file()
,mkdir()
, and tons of others. I'll try to do that and see if anything breaks.