This works but also throws a PHP error of level E_NOTICE because Key/value pair, call the unset() function on it. Value, assign a new value to that element using its key. Formerly, the string was silently converted to an array.Īs of PHP 8.1.0, creating a new array from false value is deprecated.Ĭreating a new array from null and undefined values is still allowed. It is always better to initialize a variable by a directĪs of PHP 7.1.0, applying the empty index operator on a string throws a fatalĮrror. Value will stay in the place and may actually stand However discouraged because if $arr already contains If $arr doesn't exist yet or is set to null or false, it will be created, so this isĪlso an alternative way to create an array. The key can also be omitted, resulting in an empty pair of This is done by assigning values to the array, specifying the Will be used as all others are overwritten.Ĭreating/modifying with square bracket syntaxĪn existing array can be modified by explicitly setting values If multiple elements in the array declaration use the same key, only the last one Arrays and objects can not be used as keys.ĭoing so will result in a warning: Illegal offset type.Null will be cast to the empty string, i.e.Floats are also cast to ints, which means that theįractional part will be truncated.Not be cast, as it isn't a valid decimal integer.
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