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PHP: Iterator::valid - Manual
PHP 7.2.23 Release Announcement

Iterator::valid

(PHP 5, PHP 7)

Iterator::validChecks if current position is valid

Description

abstract public Iterator::valid ( void ) : bool

This method is called after Iterator::rewind() and Iterator::next() to check if the current position is valid.

Parameters

This function has no parameters.

Return Values

The return value will be casted to boolean and then evaluated. Returns TRUE on success or FALSE on failure.

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User Contributed Notes 2 notes

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10
seva dot lapsha at gmail dot com
10 years ago
If Iterator::valid() returns false, the foreach() loop will be terminated.
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6
Voitcus at gmail dot com
6 years ago
If your class implements also ArrayAccess interface, you could use as valid() body

function valid(){   
   return $this->offsetExists($this->position);
}
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