PHP Help

[Coda]

Hey i am trying to compare 2 strings and check what word/words are common for e.g.:

$string1 = "hello my name is bob";
$string2 = "today bob went to the park"; 

now i want it to find that "bob" is most common in the 2 strings.
I have tried researching up on strcmp but i don't think that is what i need for this.

Any help is appreciated thanks

[Agnostic Bear]

Hey i am trying to compare 2 strings and check what word/words are common for e.g.:

$string1 = "hello my name is bob";
$string2 = "today bob went to the park"; 

now i want it to find that "bob" is most common in the 2 strings.
I have tried researching up on strcmp but i don't think that is what i need for this.

Any help is appreciated thanks

Something like this should do what you want:

Common words:<br />
<?php
$string1 = "hello my name is bob";
$string2 = "today bob went to the park";

$arr[] = explode( ' ', $string1 );
$arr[] = explode( ' ', $string2 );

$hold = array();

$count = count( $arr );

for( $i = 0; $i < $count; $i++ ) {
    foreach( $arr[ $i ] as $key ) {
        if( array_key_exists( $key, $hold ) ) {
            $hold[ $key ]++;
        } else {
            $hold[ $key ] = 1;
        }
    }
}

arsort( $hold );

foreach( $hold as $key => $value ) {
    if( $value > 1 ) {
        echo $key . ' with ' . $value . ' occurences.<br />';
    }
}
?>

now in function form!

Common words:<br />
<?php
function compareForCommonWords( $string1, $string2, $minAmount ) {
    
    $arr[] = explode( ' ', $string1 );
    $arr[] = explode( ' ', $string2 );
    
    $hold = array();
    
    $count = count( $arr );
    
    for( $i = 0; $i < $count; $i++ ) {
        foreach( $arr[ $i ] as $key ) {
            if( array_key_exists( $key, $hold ) ) {
                $hold[ $key ]++;
            } else {
                $hold[ $key ] = 1;
            }
        }
    }
    
    arsort( $hold );
    
    foreach( $hold as $key => $value ) {
        if( $value > $minAmount ) {
            $compare[ $key ] = $value;
        }
    }
    
    arsort( $compare );
    
    return $compare;
}

$string1 = "hello my name is bob";
$string2 = "today bob went to the park";

$compare = compareForCommonWords( $string1, $string2, 1 );

foreach( $compare as $key => $value ) {
    echo $key . ' with ' . $value . ' occurences.<br />';
}
?>

[Coda]

Thanks that worked perfectly, only problem now is that i want it to only show if the words are in both of the strings for e.g.:

$string1 = "bob is cool bob";
$string2 = "i am ok"; 

That would still say there is 2 occurances however they are not in both of the strings so display nothing. I want it to only display if they occur in both the strings.

If that makes any sense? i can't really explain it very well lol.

[Fehm]

Thanks that worked perfectly, only problem now is that i want it to only show if the words are in both of the strings for e.g.:

$string1 = "bob is cool bob";
$string2 = "i am ok"; 

That would still say there is 2 occurances however they are not in both of the strings so display nothing. I want it to only display if they occur in both the strings.

If that makes any sense? i can't really explain it very well lol.

$compare = compareForCommonWords( $string1, $string2, 1 ); 

That line would stop it from showing the 2 because it compares, so it should work But then again, I dont know lol im crap at PHP, just my idea?
lol

[Coda]

Nope, i have tried it and it still displays if "bob" appears in string1 twice, and none in string2

[Dentafrice]

Try this. This gets all the words, and checks to see if they are in both of the strings.

<?php
function common_words( $string1, $string2 ) {

    $words["string1"] = explode(' ', $string1); // gets the words for the first string.
    $words["string2"] = explode(' ', $string2); // gets the words for the second string.

    /* Goes through each of the words and checks to see if they are in the other string. */
    /* If they are, we update the counter. */
    foreach($words["string1"] as $word) {
        if(in_array($word, $words["string2"])) {
            $words_data[$word] += 1; // updates the counter for the word.
        }
    }
    
    return $words_data; // returns the data.

}

$string1 = "hello my name is bob";
$string2 = "hello today bob went to the park";

$compare = common_words($string1, $string2);

foreach($compare as $key => $value) {
    echo "{$key} appeared {$value} times in both strings. <br />";
}
?>

[Protege]

Id of done this:

<?php
function StrCommon( $Str, $Str2 )
{
    $ExplodeStr = explode( ' ', $Str );
    $ExplodeStr2 = explode( ' ', $Str2 );

    // Checks which is longer and puts it first in the check. (Probably not needed)

    if( sizeof( $ExplodeStr ) < sizeof( $ExplodeStr2 ) )
    {
        $x = $ExplodeStr2;
        $y = $ExplodeStr;
    }
    else
    {
        $x = $ExplodeStr;
        $y = $ExplodeStr2;
    }
    
    $Count = array();
    
    for( $i = 0; $i < sizeof( $x ); $i++ )
    {
        // $Count[ $x[ $i ] ]++;
        foreach( $y as $Word )
        {
            if( $Word === $x[ $i ] )
            {
                $Count[ $x[ $i ] ]++;
            }
        }
    }
    
    return $Count;
}

$string1 = "hello my name is bob";
$string2 = "hello today bob went to the park";

$Common = StrCommon( $string1, $string2 );

foreach( $Common as $Word => $Count )
{
    if( max( $Common ) === $Count )
    {
        echo 'The most common word is <b>' . $Word . '</b> with a count of ' . $Count . '<br />';
    }
}

?>

$string1 = "hello my name is bob";
$string2 = "hello today bob went to the park";

The most common word is hello with a count of 1
The most common word is bob with a count of 1

$string1 = "bob is cool bob";
$string2 = "i am ok";

Nothing

$string1 = "James Rozee is testing something called James";
$string2 = "Something is being tested by James Rozee";

The most common word is James with a count of 2

$string1 = "Something is being tested by James Rozee";
$string2 = "James Rozee is testing something called James";

The most common word is James with a count of 2

[Protege]

Improved code, I believe:

<?php
function StrCommon( $Str, $Str2 )
{
    $Array[] = explode( ' ', $Str );
    $Array[] = explode( ' ', $Str2 );
    
    array_multisort( $Array, SORT_DESC );
    
    $Count = array();
    
    for( $i = 0; $i < sizeof( $Array[ 0 ] ); $i++ )
    {
        foreach( $Array[ 0 ] as $Word )
        {
            if( $Word === $Array[ 1 ][ $i ] )
            {
                $Count[ $Word ]++;
            }
        }
    }
    
    return $Count;
}

$string1 = "hello my name is bob";
$string2 = "hello today bob went to the park";

$Common = StrCommon( $string1, $string2 );

foreach( $Common as $Word => $Count )
{
    if( max( $Common ) === $Count )
    {
        echo 'The most common word is <b>' . $Word . '</b> with a count of ' . $Count . '<br />';
    }
}

?>