in_array(value,array,type)
<?php $people = array("Peter", "Joe", "Glenn", "Cleveland"); if(in_array("Glenn", $people)) { echo"Match found"; }else{ echo"Match not found"; } ?>
输出:
Match found
array_key_exists(key,array)
<?php $a = array("a"=>"Dog", "b"=>"Cat"); if(array_key_exists("a", $a)) { echo"Key exists!"; }else{ echo"Key does not exist!"; } ?>
输出:
Key exists!
array_search(value,array,strict)
<?php $a = array("a" => "Dog", "b" => "Cat", "c" => 5, "d" => "5"); echo array_search("Dog", $a); echo array_search("5", $a); ?>
输出:
ac