Php array index and key-value operation skills Example Analysis

Php array index and key-value operation skills Example Analysis

This article describes the php array indexing and key-value operation skills. Share it with you for your reference. The details are as follows:

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<? Php $ Array = array ("a", "B", "c"); // defines an array $ Array [] = "Simon"; // Add a new array element. Print_r ($ array); // output array ?>

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<? Php $ Array = array ("a", "B", "c"); // defines an array $ Array [9] = "Simon"; // Add a new array element. Print_r ($ array); // output array ?>

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<? Php // Create a simple array $ Array = array (0 => 1, 1 => 2, 2 => 3, 3 => 4, 6 => 5 ); Print_r ($ array ); // Now update the value of 2 in the array to 100. $ Array [2] = 100; Print_r ($ array ); // Add a key $ Array ["X"] = 50; 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 another key $ Array [] = 25; Print_r ($ array ); // Use the array_values function for re-Indexing $ Array = array_values ($ array ); $ Array [] = 13; Print_r ($ array ); ?>

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