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31 lines
639 B
PHP
31 lines
639 B
PHP
<?php
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/**
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* Linear search in PHP
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*
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* Reference: https://www.geeksforgeeks.org/linear-search/
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*
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* Examples:
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* data = 5, 7, 8, 11, 12, 15, 17, 18, 20
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* x = 15
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* Element found at position 6
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*
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* x = 1
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* Element not found
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*
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* @param Array $list an array of integers to search
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* @param integer $target an integer number to search for in the list
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* @return integer the index where the target is found (or -1 if not found)
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*/
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function linearSearch($list, $target)
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{
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$n = sizeof($list);
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for ($i = 0; $i < $n; $i++) {
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if ($list[$i] == $target) {
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return $i + 1;
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}
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}
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return -1;
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}
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