PHP Array Inconsistency?

Question

I have some code that pushes values into a PHP array via array_push(). However, when I do print_r() on the array, it skips a key, and the ending result looks like this:

Array ( 
  [0] => appease 
  [1] => cunning 
  [2] => derisive 
  [3] => effeminate 
  [4] => grievance 
  [5] => inadvertently miscreants 
  [7] => ominous 
  [8] => resilient 
  [9] => resolute 
  [10] => restrain 
  [11] => superfluous 
  [12] => trudged 
  [13] => undiminished 
)

As you can see, it skipped the 6th value, and moved onto the next one. For some reason though, if I call the foreach() method on the array, it stops after "grievance", or index 4. Does anyone know why it does this?

Edit: if I do echo $words[6], it prints the value of the 6th index correctly.

Edit 2: here's my code:

$return = file_get_contents($target_file);
$arr = explode('<U><B>', $return);
$a = 1;

$words = [];

foreach($arr as $pos) {
    $important = substr($arr[$a], 0, 20);
    $arr2 = explode("</B></U>",$important);
    array_push($words,strtolower(trim($arr2[0])));
    $a++;
}

Contents of the file are:

<U><B>appease</B></U><U><B>cunning</B></U><U><B>derisive</B></U><U><B>effeminate</B></U><U><B>grievance</B></U><U><B>inadvertently</B></U><U><B>miscreants</B></U><U><B>ominous</B></U><U><B>resilient</B></U><U><B>resolute</B></U><U><B>restrain</B></U><U><B>superfluous</B></U><U><B>trudged</B></U><U><B>undiminished</B></U>

*removed some irrelevant file content for easier readability

Then show us what you did so others can learn from your mistake. It's fine to post your own answer and accept it (after a grace period). — tripleee, Mar 06 '15 at 07:24

score 1 · Answer 1 · answered Mar 06 '15 at 02:43

1

i wrote something simplier:

<?php
$return="<U><B>appease</B></U><U><B>cunning</B></U><U><B>derisive</B></U><U><B>effeminate</B></U><U><B>grievance</B></U><U><B>inadvertently</B></U><U><B>miscreants</B></U><U><B>ominous</B></U><U><B>resilient</B></U><U><B>resolute</B></U><U><B>restrain</B></U><U><B>superfluous</B></U><U><B>trudged</B></U><U><B>undiminished</B></U>";

$arr = explode('<U><B>', $return);


$words = [];

foreach($arr as $pos) {
    if(!empty($pos)){
    $words[]=strip_tags($pos);
    }
} 


echo '<pre>';
print_r($words);

demo: http://codepad.viper-7.com/XeUWui

answered Mar 06 '15 at 02:43

3

`$words = array_map('strip_tags', array_filter($arr));` :-) – zerkms Mar 06 '15 at 02:48
`$return = array_map('strip_tags', array_filter(explode('', $return)));` :-D – check Mar 06 '15 at 02:54
2

@zerkms you win the internet – Mar 06 '15 at 02:54

Kanishka Panamaldeniya · Answer 2 · 2015-03-06T02:52:00.900

0

$arr = "<U><B>appease</B></U><U><B>cunning</B></U><U><B>derisive</B></U><U><B>effeminate</B></U><U><B>grievance</B></U><U><B>inadvertently</B></U><U><B>miscreants</B></U><U><B>ominous</B></U><U><B>resilient</B></U><U><B>resolute</B></U><U><B>restrain</B></U><U><B>superfluous</B></U><U><B>trudged</B></U><U><B>undiminished</B></U>";

$arr = explode('<U><B>', $arr);
$a = 1;

foreach($arr as &$pos) 
{        
   if(!empty($pos))
   {
      $pos = str_replace("</B></U>","",$pos);   
   }
} 

print_r(array_filter($arr));

edited Mar 06 '15 at 02:52

answered Mar 06 '15 at 02:45

Kanishka Panamaldeniya

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this has a couple of errors in it starting with a syntax error on the if line – Mar 06 '15 at 02:49
@Dagon "a syntax error on the if line" --- is there actually? – zerkms Mar 06 '15 at 02:51
@Dagon yaa , I wonder why i cannot write simple and brilliant code like that , I think i have to learn more hard ;) – Kanishka Panamaldeniya Mar 06 '15 at 03:00
1

@KanishkaPanamaldeniya we all do. :-) – Mar 06 '15 at 03:04

score 0 · Answer 3 · answered Mar 06 '15 at 02:55

Might be overkill but there is always SimpleXml as well:

$arr = "<U><B>appease</B></U><U><B>cunning</B></U><U><B>derisive</B></U><U><B>effeminate</B></U><U><B>grievance</B></U><U><B>inadvertently</B></U><U><B>miscreants</B></U><U><B>ominous</B></U><U><B>resilient</B></U><U><B>resolute</B></U><U><B>restrain</B></U><U><B>superfluous</B></U><U><B>trudged</B></U><U><B>undiminished</B></U>";
$xml = new SimpleXmlElement('<root>' . $arr . '</root>');
$words = $xml->xpath('//B');

foreach ($words as $i =>$word) {
  printf("%d.\t%s\n", $i+1, $word);
}

score 0 · Answer 4 · answered Mar 06 '15 at 04:13

This is pretty simple with regex:

<?php

$words = "<U><B>appease</B></U><U><B>cunning</B></U><U><B>derisive</B></U><U><B>effeminate</B></U><U><B>grievance</B></U><U><B>inadvertently</B></U><U><B>miscreants</B></U><U><B>ominous</B></U><U><B>resilient</B></U><U><B>resolute</B></U><U><B>restrain</B></U><U><B>superfluous</B></U><U><B>trudged</B></U><U><B>undiminished</B></U>";

preg_match_all("#<U><B>(.*?)</B></U>#",$words,$matches);

print_r($matches[1]);
?>

Fiddle here

PHP Array Inconsistency?

4 Answers4