给定一个字符串和一个字符串数组，检查字符串是否包含数组中的所有单词

Question

So here is situation let's imagine a string and an array:

$str = 'Sample string';
$arr = array('sample', 'string')

What would be the best way to determine if the given string has all of the words contained in the array? String can be longer, and has additional words, it does not matter. The only thing I need, is a function that given a string and an array would return true, if string contains every single word that is in array (case and order I'm which they appear does not matter)

Answer 1

You can simply use str_word_count with extra parameter 1 like as

$str = 'Sample string';
$arr = array('sample', 'string');
$new_arr = array_intersect(array_map('strtolower',str_word_count($str,1)),$arr);
print_r($new_arr);

Output:

Array
(
    [0] => sample
    [1] => string
)

Demo

Answer 2

Try this out.

$strArray = explode(" ", $str);
$result = array_intersect($strArray, $arr);
if(sizeof($result) == sizeof($arr)){
   return TRUE;
}else{
   return FALSE;
}

if this don't work, then try swapping the inputs in array_intersect($arr, $strArray) You can add other functions to make all lowercase before comparing to give it a finishing touch.

Answer 3

Try this one:

<?php 
$words = array('sample', 'string');
$str = 'sample string';
strtolower($str);
$strArr = explode(' ',$str);
$wordfound = false;
foreach ($strArr as $k => $v) {
    if (in_array($v,$words)) {$wordfound = true; break;}
    foreach($words as $kb => $vb) {
        if (strstr($v, $kb)) $wordfound = true;
        break;
    }
}
if ($wordfound) {
    echo 'Found!';
}
else echo 'Not found!';

Answer 4

If performance matters, I would use an associative array:

$words = array_flip(preg_split('/\\s+/', strtolower($str)));
$result = true;
foreach ($arr as $find) {
    if (!isset($words[$find])) {
        $result = false;
        break;
    }
}

Demo

Answer 5

$str = 'Sample string';
$str1=strtolower($str);


 $arr = array(
            'sample',
            'string'
        );

        foreach($arr as $val)
        {
            if(strpos($str1,strtolower($val)) !== false)
            {
                $msg='true';
            }
            else
            {
                $msg='false';
                break;
            }
        }

     echo $msg;