Linear Search in Php

Welcome to the Linear Search in Php page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

<?php
function usage()
{
    exit('Usage: please provide a list of integers ("1, 4, 5, 11, 12") and the integer to find ("11")');
}

function parse_int($str_value)
{
    // Remove leading and trailing spaces
    $str_value = trim($str_value);

    // Make sure all digits
    if (preg_match("/[+-]?^\d+$/", $str_value) === FALSE)
    {
        return FALSE;
    }

    // Make sure valid integer
    if (
        filter_var(
            $str_value,
            FILTER_VALIDATE_INT,
            array(
                'options' => array(
                    'decimal' => TRUE,
                    'min_range' => PHP_INT_MIN,
                    'max_range' => PHP_INT_MAX
                )
            )
        ) === FALSE
    )
    {
        return FALSE;
    }

    return intval($str_value);
}

function parse_int_array($str_values)
{
    $str_array = explode(",", $str_values);
    $values = array();
    foreach ($str_array as $str_value)
    {
        $value = parse_int($str_value);
        if ($value === FALSE)
        {
            return FALSE;
        }

        array_push($values, $value);
    }

    return $values;
}

// Exit if too few arguments
if (count($argv) < 3)
{
    usage();
}

// Parse 1st argument. Exit if invalid or too few values
$values = parse_int_array($argv[1]);
if ($values === FALSE || count($values) < 1)
{
    usage();
}

// Parse 2nd argument. Exit if invalid
$target = parse_int($argv[2]);
if ($target === FALSE)
{
    usage();
}

// Use built-in linear search and show result
$index = array_search($target, $values);
printf("%s\n", ($index !== FALSE) ? "true" : "false");

Linear Search in Php was written by:

• rzuckerm

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

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