3v4l.org

run code in 300+ PHP versions simultaneously

@ 2018-12-18T19:53:42Z

<?php

$dictionary = array("hello", "hi", "how r u", "how are you", "how r you", "how are u");


function isDictionaryWord($str,$dictionary){
    foreach($dictionary as $each_word){
        if(isSubsequence(strtolower($each_word),strtolower($str))){
            return true;
        }
    }
    return false;
}       

function isSubsequence($needle,$haystack){
    $len1 = strlen($needle);
    $len2 = strlen($haystack);
    if($len1 > $len2) return false;
    $ptr = 0;
    
    for($i=0;$i<$len2 && $ptr < $len1;$i++){
        if($haystack[$i] === $needle[$ptr]) $ptr++;
    }
    
    return $ptr == $len1;
}


$tests = array(
        'Hello',
        'Helloooo',
        'How r youuu !!!!',
        'hell',
        'w are y'
    );
    
foreach($tests as $each_test){
    echo $each_test," => ",var_dump(isDictionaryWord($each_test,$dictionary)),PHP_EOL;
}

Output for 5.6.38, 7.0.33, 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Hello => bool(true) Helloooo => bool(true) How r youuu !!!! => bool(true) hell => bool(false) w are y => bool(false)
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Hello => bool(true) Helloooo => bool(true) How r youuu !!!! => bool(true) hell => bool(false) w are y => bool(false)

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168.16 ms | 402 KiB | 154 Q