Online PHP editor | rfc for AT6pF

@ 2017-11-07T02:22:45Z

<?php
$posts['Author1']=['sdsadsad daSDA DDASd asd aSD Sd dA  SD ASD sadasdasds sadasd

@jhsad.sadas.com sdsdADSA sada',
'KDJKLFFD GFDGFDHGF GFHGFDHGFH GFHFGH Lklfgfd gdfsgfdsg  df gfdhgf g  
hfghghjh jhg @jhsad.sadas.com sfgff fsdfdsf',
'jhjkfsdg fdgdf sfds hgfj j kkjjfghgkjf hdkjtkj lfdjfg hkgfl  
@jhsad.sadas.com dsfjdshflkds kg lsfdkg;fdgl'];

$posts['Author2']=['This is some random string representative of non-signature text.

This is the
 *author\'s* signature.',
        'Different message body text.      This is the
 *author\'s* signature.

    This is an afterthought that expresses that a signature is not always at the end.',
        'Finally, this is unwanted stuff. This is the
 *author\'s* signature.'];

foreach($posts as $author=>$texts){
    echo "Author: $author\n";
    
    usort($texts,function($a,$b){return strlen($a)-strlen($b);}); // sort ASC by strlen; mb_strlen probably isn't advantageous
    var_export($texts);
    echo "\n";

    foreach($texts as $index=>$string){
        if(!$index){
            $overlaps=preg_split('/\s+/',$string,NULL,PREG_SPLIT_NO_EMPTY);  // declare with all non-white-space substrings from first text
        }else{
            $overlaps=array_intersect($overlaps,preg_split('/\s+/',$string,NULL,PREG_SPLIT_NO_EMPTY));  // filter word bank using narrowing number of words
        }
    }
    var_export($overlaps);
    echo "\n";
    
    // batch consecutive substrings
    $group=null;
    $consecutives=[];  // clear previous iteration's data
    foreach($overlaps as $i=>$word){
        if($group===null || $i-$last>1){
            $group=$i;
        }
        $last=$i;
        $consecutives[$group][]=$word;
    }
    var_export($consecutives);
    echo "\n";
    
    foreach($consecutives as $words){
        // match potential signatures in first text for measurement:
        if(preg_match_all('/\Q'.implode('\E\s+\Q',$words).'\E/',$texts[0],$out)){  // make alternatives characters literal using \Q & \E
            $potential_signatures=$out[0];
        }
    }
    usort($potential_signatures,function($a,$b){return strlen($b)-strlen($a);}); // sort DESC by strlen; mb_strlen probably isn't advantageous
    
    echo "Assumed Signature: {$potential_signatures[0]}\n\n";
}

Output for git.master, git.master_jit, rfc.property-hooks: Author: Author1 array ( 0 => 'sdsadsad daSDA DDASd asd aSD Sd dA SD ASD sadasdasds sadasd @jhsad.sadas.com sdsdADSA sada', 1 => 'jhjkfsdg fdgdf sfds hgfj j kkjjfghgkjf hdkjtkj lfdjfg hkgfl @jhsad.sadas.com dsfjdshflkds kg lsfdkg;fdgl', 2 => 'KDJKLFFD GFDGFDHGF GFHGFDHGFH GFHFGH Lklfgfd gdfsgfdsg df gfdhgf g hfghghjh jhg @jhsad.sadas.com sfgff fsdfdsf', ) Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in /in/AT6pF on line 30 Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in /in/AT6pF on line 32 Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in /in/AT6pF on line 32 array ( 11 => '@jhsad.sadas.com', ) array ( 11 => array ( 0 => '@jhsad.sadas.com', ), ) Assumed Signature: @jhsad.sadas.com Author: Author2 array ( 0 => 'Finally, this is unwanted stuff. This is the *author\'s* signature.', 1 => 'This is some random string representative of non-signature text. This is the *author\'s* signature.', 2 => 'Different message body text. This is the *author\'s* signature. This is an afterthought that expresses that a signature is not always at the end.', ) Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in /in/AT6pF on line 30 Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in /in/AT6pF on line 32 Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in /in/AT6pF on line 32 array ( 2 => 'is', 5 => 'This', 6 => 'is', 7 => 'the', 8 => '*author\'s*', 9 => 'signature.', ) array ( 2 => array ( 0 => 'is', ), 5 => array ( 0 => 'This', 1 => 'is', 2 => 'the', 3 => '*author\'s*', 4 => 'signature.', ), ) Assumed Signature: This is the *author's* signature.

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