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突突突破 2010-04-12
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phpboy 2010-04-09
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array_key_exists
foolbirdflyfirst 2010-04-09
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php数组本身就是hash结构，知道某个key的值
只需判断if(isset( $array['key值'] ))就行了
只需判断if(isset( $array['key值'] ))就行了
骄傲青蛙 2010-04-09
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<?php
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
echo "The 'first' element is in the array";
}
$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');
$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array); // $key = 1;
?>
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
echo "The 'first' element is in the array";
}
$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');
$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array); // $key = 1;
?>
