PHP array index and key-value operation Tips Example Analysis _php tutorial

An example analysis of PHP array index and key-value manipulation techniques

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$array = Array ("A", "B", "C"); Defining arrays $array [] = "Simon"; Add a new array element Print_r ($array); Output array ?>

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$array = Array ("A", "B", "C"); Defining arrays $array [9] = "Simon"; Add a new array element Print_r ($array); Output array ?>

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!--? php //Create a simple array $ar Ray = Array (0=>1, 1=>2, 2=>3, 3=>4, 6=>5); Print_r ($array); //Now update the value in the array with the key 2 to + $array [2] =; Print_r ($array); //Add a key now $array ["X"] =; Print_r ($array); //Delete all keys now, but keep the structure of the array itself foreach ($array as $i = = $value) { unset ($array [$i]); } Print_r ($array); //Add a key again $array [] =; Print_r ($array); //re-index using the Array_values function $array = array_values ($array); $array [] =; Print_r ($array); ?

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