I'm using this little code to pick up words with a minimum of 2 characters, but it returns me:
Notice: Array to string conversion in echo $ word;
preg_match_all("/[a-z0-9\-]{2,}/i", "oi voce tem problema pra entender isso?", $output_array);
foreach($output_array as $word) {
echo $word;
}
It should return: oi, voce, tem, problema, pra, entender, isso
The preg_match_all function returns a% multi-dimensional%, the amount of subarrays is proportional to the number of groups in the regular expression, such as mentioned by bfavaretto in comment .
To access the result, enter the subarray index, which in this case is 0 .
$string = 'oi, voce, tem, problema, pra, entender, isso?';
if (preg_match_all("/[a-z0-9\-\,]{2,}/", $string, $output_array) !== false) {
foreach($output_array[0] as $word) {
echo $word;
}
}
// oi,voce,tem,problema,pra,entender,isso
From the PHP documentation:
So, $ out [0] contains array of strings that matched full pattern, and $ out [1] contains array of strings enclosed by tags.
This means that in its variable $output_array the index 0 represents an array of strings containing the values found that close with the complete regular expression. Already in the index 1 is another array of strings containing the values found that close with the expressions delimited by tags (the parentheses).
For example, see the code below.
preg_match_all("/.*(World).*/", "Hello World", $out);
The result of $out will be:
Array (
[0] => Array (
[0] => Hello World
)
[1] => Array (
[0] => World
)
)
Finally, what you want is to go through the array that closes with the complete expression.
foreach($output_array[0] as $word) {
echo $word;
}
You have to declare the array appropriately, eg:
<?php
$someArray = array('1','2','3','4','5','6','7'); // size 7
foreach($someArray as $value){
echo $value . "<br />\n";
}
?>