php reset



as for taking first key of an array, it's much more efficient to reset and then key, rather then reset result of array_keys (as sugested by gardnerjohng at g dot com). <?php reset($somearray); echo key($somearray); ?> this will give the same result but is much much faster. larger arrays, better performance.

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example. output the value of the current and next element in an array, then reset the array's internal pointer to the first element in the array: <?php $people = array("peter", "joe", "glenn", "cleveland"); echo current($people) . " "; echo next($people) . " "; echo reset($people); ?> run example »  php reset() function: the reset() function used to move the array's internal pointer to the first element.

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$myarray=array(); reset $myarray to an empty array. share|improve this answer. answered nov ' at :. tarek. ,. add a comment |. up vote down vote. also, don't use unset( $array ); the execution time is way longer than = array();. share|improve this answer. answered nov ' at  i've just been through this exact thing, see my previous question & the incredible helpful answers. in the end i had to do a manual reset of the values in php. edit: not quite the same scenario for you as you seem to be populating the form values based on $_post rather than $_session as i did. in which 

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mai to reset the keys of all arrays in an array: $arr = array_map('array_values', $arr);. in case you just want to reset firstlevel array keys, use array_values() without array_map . there's also the possibility that some of the properties could have been given default values (e.g. protected $somearray = array(); )if you want to reset all the properties back to their original default values then you have to use reflection: class object { function resetobject() { $blankinstance = new static; 

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you could do something around these lines (and avoid the limitations of recursion): while (true) { $reset = false; foreach ($rows as $row) { if(something true) { continue; } else { $reset = true; break; } } if ( ! $reset ) { break; # break out of the while(true) } # otherwise the foreach loop is `reset` }. déc. as nacmartin said, unset will "undefine" a variable. you could also set the variable to null, however this is how the two approaches differ: $x = ; $y = ; isset($x); true; isset($y); true; $x = null; unset($y); isset($x); false isset($y); false echo $x; null echo $y; php notice (y not defined). share|improve 

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the array_values() function does that: $a = array( => "hello", => "moo", => "america" ); $b = array_values($a); print_r($b); array ( [] => hello [] => moo [] => america ).

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