Type Safety
Legacy code
haystack = $data;
}
function find($needle) {
return in_array($needle, $this->haystack, true);
}
}
$storage = new Data(['apple','orange','banana']);
$fruit = false;
$storage->find($fruit);
]]>
Going straight to strict types risks runtime fatals
haystack = $data;
}
function find(string $needle):bool {
return in_array($needle, $this->haystack, true);
}
}
$storage = new Data(['apple','orange','banana']);
$fruit = false;
$storage->find($fruit);
]]>
find(false)
#1 {main}
thrown in test.php on line 6
]]>
Intermediate step
haystack = $data;
}
/**
* @param string $needle
* @return bool
*/
function find($needle) {
return in_array($needle, $this->haystack, true);
}
}
$storage = new Data(['apple','orange','banana']);
$fruit = false;
$storage->find($fruit);
]]>