Typo¶
A typo is short for typographical error. It refers to a mistake made in the typing of the code. Typographical errors can include misspelled words, misplaced operators. Typos can occur in various contexts, such as types, expressions, naming.
A typo can lead to a visible or invisible error. An typo in the function name of array_slice(), like array_sloce() leads to a fatal error, as the function is not defined;
On the other hand, a typo on the same function, written array_splice(), note the extra p, leads to arguments errors, as this new function exists, but requests different types of data.
Typo happen in any text based system.
<?php
// The typo has placed the === false INSIDE the in_array(), and changes the behavior
if (in_array($array, $value, $strict === false)) {
}
// the type and is not expected, instead of an integer
function foo(ant $i) {
}
?>
See also Top Common PHP Errors and Top Common PHP Errors and How to Fix Them.
Related : Silent Behavior, Semantics
