preg_match_all into simple array
Solution 1
You will always get a multidimensional array back, however, you can get close to what you want like this:
if (preg_match_all('#<h2>(.*?)</h2>#is', $source, $output, PREG_PATTERN_ORDER))
$matches = $output[0]; // reduce the multi-dimensional array to the array of full matches only
And if you don't want the submatch at all, then use a non-capturing grouping:
if (preg_match_all('#<h2>(?:.*?)</h2>#is', $source, $output, PREG_PATTERN_ORDER))
$matches = $output[0]; // reduce the multi-dimensional array to the array of full matches only
Note that this call to preg_match_all is using PREG_PATTERN_ORDER instead of PREG_SET_ORDER:
PREG_PATTERN_ORDER Orders results so that $matches[0] is an array of full pattern matches, $matches[1] is an array of strings matched by the first parenthesized subpattern, and so on.
PREG_SET_ORDER Orders results so that $matches[0] is an array of first set of matches, $matches[1] is an array of second set of matches, and so on.
See: http://php.net/manual/en/function.preg-match-all.php
Solution 2
Use
#<h2>(?:.*?)</h2>#is
as your regex. If you use a non capturing group (which is what ?:
signifies), a backreference won't show up in the array.
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Comments
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DadaB over 1 year
I have preg_match_all function:
preg_match_all('#<h2>(.*?)</h2>#is', $source, $output, PREG_SET_ORDER);
It's working as intended, BUT the problem is, it preg_matches all items twice and into a huge multi dimensional array like this for example where it, as intended, preg_matched all 11 items needed, but twice and into a multidimensional array:
Array ( [0] => Array ( [0] => <h2>10. <em>Cruel</em> by St. Vincent</h2> [1] => 10. <em>Cruel</em> by St. Vincent ) [1] => Array ( [0] => <h2>9. <em>Robot Rock</em> by Daft Punk</h2> [1] => 9. <em>Robot Rock</em> by Daft Punk ) [2] => Array ( [0] => <h2>8. <em>Seven Nation Army</em> by the White Stripes</h2> [1] => 8. <em>Seven Nation Army</em> by the White Stripes ) [3] => Array ( [0] => <h2>7. <em>Do You Want To</em> by Franz Ferdinand</h2> [1] => 7. <em>Do You Want To</em> by Franz Ferdinand ) [4] => Array ( [0] => <h2>6. <em>Teenage Dream</em> by Katie Perry</h2> [1] => 6. <em>Teenage Dream</em> by Katie Perry ) [5] => Array ( [0] => <h2>5. <em>Crazy</em> by Gnarls Barkley</h2> [1] => 5. <em>Crazy</em> by Gnarls Barkley ) [6] => Array ( [0] => <h2>4. <em>Kids</em> by MGMT</h2> [1] => 4. <em>Kids</em> by MGMT ) [7] => Array ( [0] => <h2>3. <em>Bad Romance</em> by Lady Gaga</h2> [1] => 3. <em>Bad Romance</em> by Lady Gaga ) [8] => Array ( [0] => <h2>2. <em>Pumped Up Kicks</em> by Foster the People</h2> [1] => 2. <em>Pumped Up Kicks</em> by Foster the People ) [9] => Array ( [0] => <h2>1. <em>Paradise</em> by Coldplay</h2> [1] => 1. <em>Paradise</em> by Coldplay ) [10] => Array ( [0] => <h2>Song That Get Stuck In Your Head YouTube Playlist</h2> [1] => Song That Get Stuck In Your Head YouTube Playlist ) )
How to convert this array into simple one and without those duplicated items? Thank you very much.
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DadaB over 11 yearsIt probably supposed to be $matches = $output[0]. Thanks It worked :)
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jimp over 11 years@MantasBalaisa Oh, you're correct! I'm not sure what I was thinking. Thanks. Fixed.
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Dan almost 9 yearsMight need to escape the forward slashes?
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jimp almost 9 years@Silver89 No, '#' characters were used as the pattern delimiter. The forward slashes do not need escaping.