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This article introduces the usage of the array_key_exists() function of the PHP array function. Friends in need can refer to it.
In the php array function, the function array_key_exists() implements this function: Returns true if a specified key is found in an array, false otherwise. The form is as follows: boolean array_key_exists(mixed key,array array); Example, search for apple in the array key, if found, the color of this fruit will be output:
<?php
//array_key_exists函数用法举例
//by bbs.it-home.org
$fruit["apple"] = "red";
$fruit["banana"] = "yellow";
$fruit["pear"] = "green";
if(array_key_exists("apple", $fruit)){
printf("apple's color is %s",$fruit["apple"]);
}
//apple's color is red
?>Copy after login |
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