Get String Between - Find All Occurrences PHP

PHP Find all occurrences of a substring in a string

Without using regex, something like this should work for returning the string positions:

$html = "dddasdfdddasdffff";
$needle = "asdf";
$lastPos = 0;
$positions = array();

while (($lastPos = strpos($html, $needle, $lastPos))!== false) {
    $positions[] = $lastPos;
    $lastPos = $lastPos + strlen($needle);
}

// Displays 3 and 10
foreach ($positions as $value) {
    echo $value ."<br />";
}

Get string between - Find all occurrences PHP

One possible approach:

function getContents($str, $startDelimiter, $endDelimiter) {
  $contents = array();
  $startDelimiterLength = strlen($startDelimiter);
  $endDelimiterLength = strlen($endDelimiter);
  $startFrom = $contentStart = $contentEnd = 0;
  while (false !== ($contentStart = strpos($str, $startDelimiter, $startFrom))) {
    $contentStart += $startDelimiterLength;
    $contentEnd = strpos($str, $endDelimiter, $contentStart);
    if (false === $contentEnd) {
      break;
    }
    $contents[] = substr($str, $contentStart, $contentEnd - $contentStart);
    $startFrom = $contentEnd + $endDelimiterLength;
  }

  return $contents;
}

Usage:

$sample = '<start>One<end>aaa<start>TwoTwo<end>Three<start>Four<end><start>Five<end>';
print_r( getContents($sample, '<start>', '<end>') );
/*
Array
(
    [0] => One
    [1] => TwoTwo
    [2] => Four
    [3] => Five
)
*/ 

Demo.

Get all occurrences of a string between two delimiters in PHP

Just use preg_match_all and keep things simple:

$input = "|foo| hello |foo| nothing here |foo| world |foo|";
preg_match_all("/\|foo\|\s*(.*?)\s*\|foo\|/", $input, $matches);
print_r($matches[1]);

This prints:

Array
(
    [0] => hello
    [1] => world
)

How to get a substring between two strings in PHP?

If the strings are different (ie: [foo] & [/foo]), take a look at this post from Justin Cook.
I copy his code below:

function get_string_between($string, $start, $end){
    $string = ' ' . $string;
    $ini = strpos($string, $start);
    if ($ini == 0) return '';
    $ini += strlen($start);
    $len = strpos($string, $end, $ini) - $ini;
    return substr($string, $ini, $len);
}

$fullstring = 'this is my [tag]dog[/tag]';
$parsed = get_string_between($fullstring, '[tag]', '[/tag]');

echo $parsed; // (result = dog)

Find all text occurrences between h2/h2

Change your Regex to

preg_match_all('#<h2.*?>(.*?)</h2>#i',$text, $found);

Explanation

<h2.*?> - ignore the classes/attributes in the tag if any
(.*?)   - capture everything
</h2>   - match end tag
i       - ignore case 

Then Loop through Array and print values

foreach ($found[1] as $a) 
  echo $a." ";

Get ALL content between two tags in a string

Here is a function I've written some months ago for exactly this issue. You'd have to call the function several times with the offset according to the returned $pos in order to get all accurances. I hope that's acceptable.

/* getSubstring
   returns a substring between string_before and string_after,
   starts to search at the offset. character of source
   returns an array: ['text'] = string found
                     ['pos'] = starting position of string_before within source
   returns text = '' and pos = false if string is not found
   example: $key = get_substring('12345here67890', '12345','67890')[0];
*/

function getSubstring($source, $string_before, $string_after, $offset = 0, $includeEnvelope = false) {
   if (strlen($source)<$offset)
      return(array('text' => '', 'pos' => false)); // kind of silly, but prevents an 'Offset not contained in string' warning
   $pos1 = strpos($source, $string_before, $offset);
   $sb_len = strlen($string_before);
   if ($pos1===false) {
      $result = '';
   }
   else {
      $pos2 = strpos($source, $string_after, $pos1 + strlen($string_before));
      if ($pos2===false) {
         $result = '';
         $pos1 = false;
      }
      else {
         $result = substr($source, $pos1 + $sb_len, $pos2 - $pos1 - $sb_len);
         if ($includeEnvelope)
            $result = $string_before.$result.$string_after;
     }
   }
   return (array('text' => $result, 'pos' => $pos1));
}

How to find all substrings between two delimiters in php?

I don't know that explode does the trick, but this seems to:

$string = "var name=cat; *bunch of random strings* var name=dog;*bunch of random strings*var name=cow;*bunch of random strings*";
preg_match_all('/name=([^;]+)/', $string, $matches);
print_r($matches[1]);

or, as a function :

function wizbangStringParser ($string) {
    preg_match_all('/name=([^;]+)/', $string, $matches);
    return $matches[1];
}

Get content between two strings PHP

• Use # instead of / so you dont have to escape them.
• The modifier s makes . and \s also include newlines.
• { and } has various functionality like from n to m times in {n,m}.

• The basic

  preg_match('#\\{FINDME\\}(.+)\\{/FINDME\\}#s',$out,$matches);
  

• The advanced for various tags etc (styling is not so nice by the javascript).

  $delimiter = '#';
  $startTag = '{FINDME}';
  $endTag = '{/FINDME}';
  $regex = $delimiter . preg_quote($startTag, $delimiter) 
                      . '(.*?)' 
                      . preg_quote($endTag, $delimiter) 
                      . $delimiter 
                      . 's';
  preg_match($regex,$out,$matches);
  

Put this code in a function

• For any file which you do not want to execue any stray php code, you should use file_get_contents. include/require should not even be an option there.

Get multiple matches in string between two strings - small issue in function that I use?

$string = "somerandomcharacters[code]object1[/code]somerandomcharacters[code]object2[/code]somerandomcharacters[code]object3[/code]somerandomcharacters";

preg_match_all('%\[code\](.*?)\[/code\]%i', $string, $matches, PREG_PATTERN_ORDER);

print_r($matches[1]);

---

Output:

Array
(
    [0] => object1
    [1] => object2
    [2] => object3
)

---

Regex Explanation:

\[code\](.*?)\[/code\]

Options: Case insensitive

Match the character “[” literally «\[»
Match the character string “code” literally (case insensitive) «code»
Match the character “]” literally «\]»
Match the regex below and capture its match into backreference number 1 «(.*?)»
   Match any single character that is NOT a line break character (line feed) «.*?»
      Between zero and unlimited times, as few times as possible, expanding as needed (lazy) «*?»
Match the character “[” literally «\[»
Match the character string “/code” literally (case insensitive) «/code»
Match the character “]” literally «\]»

---

DEMO: http://ideone.com/wVvssx

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