$arr = array("php", "java", "c", "c#", "c++", "javascript", "python");
if (($key = array_search("javascript", $arr)) !== false) {
unset($arr[$key]);
}
print_r($arr);
/*
run:
Array
(
[0] => php
[1] => java
[2] => c
[3] => c#
[4] => c++
[6] => python
)
*/