Array ' find ' operation

1. Whether an element exists in the array:

Echo '
Array Operation 1:in_array ($value, $array, $type) ';//$type: Whether the value of $value is type-matched True/false, the default value is False $arr =array ("name" = "DOOR ",";(in_array ("+", $arr))? $v = "exists": $v = "does not exist"; echo "
". $v;

Code Run Result:

Operation of the array 1:in_array ($value, $array, $type) exists

2. Specify whether the key value exists in the array:

Echo '
The operation of the array 2:array_key_exists ($key, $array) ';//The key value of element 32 is 0, the lookup key value is "0", there is no strict type matching $arr=array ("name" = "DOOR", "+"); if (array _key_exists ("0", $arr)) {echo "
Exist ";}

Code Run Result:

Operation of the array 2:array_key_exists ($key, $array) exists

Summary: In_array and array_key_exists matching are case-sensitive.

The above introduces the array array ' find ' operation, including the aspects of the content, I hope to be interested in PHP tutorial friends helpful.

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