Error finding specific word in array

PHP
1

I need to check if in my array is the word “Location”.

I have tried those.

With array_search

echo array_search('Location', $the_array);

echo array_search("Location", $the_array);

echo array_search('/Location/', $the_array);

echo array_search("/Location/", $the_array);

None of them gives me the key (in my case the key should be 2).

With in_array

if (in_array('Location', $the_array)) {
    echo "Yes";
} else {
    echo "No";
}

if (in_array('/Location/', $the_array)) {
    echo "Yes";
} else {
    echo "No";
}

if (in_array("Location", $the_array)) {
    echo "Yes";
} else {
    echo "No";
}

if (in_array("/Location/", $the_array)) {
    echo "Yes";
} else {
    echo "No";
}

In every case i get the No response

The array

Array
(
    [0] => Tynie 
    [1] =>   
    [2] =>        Tynecastle Stadium       Location in Edinburgh 
    [3] => Gorgie, Edinburgh, Scotland
    [4] => 55°56′21″N  3°13′56″W    /  55.93917°N 3.23222°W  / 55.93917; -3.23222     
)
2

those will look for a full match (i.e. the complete value must match the given string). but you only have a partial match. not sure why you would expect those to work since the use cases are clearly described and shown in the Manual.

3

I guess trying random variations like singe ↔ double quotes, with ↔ without slashes, and different functions etc. without understanding what is happening is part of the learning process. I confess I did it when I started and some rare times doing so “worked” or at least seemed to.

But I long ago realized that sifting through the documentation and looking at the examples yielded much better use of my time in getting to a solution than testing guesses.

As Dormilich posted, those functions deal with exact array values as a whole, not value components.

I think you will need to use a callback that uses string functions inside it to test for the presence of the needle.

Maybe array_walk could work for what you need?

http://php.net/manual/en/function.array-walk.php

1 Like
4

better use array_filter() : http://php.net/array-filter

1 Like
5

Thanks to all for replays , can you tell me how to achieve what i need, to find the word “Location” in the array and to give back the key ?

6

Which callback are you using?

AFAIK they should either already take the key as a parameter or have a Flag that lets you send it as one.

As far as finding the string, I doesn’t look like any regex would be needed so a string function should be sufficient. Though you may want “mb” if you are dealing with characters outside of the 0-127 range.
* pay note to documentation when it says to use the “===” operator,

strpos() - Find the position of the first occurrence of a substring in a string
stripos() - Find the position of the first occurrence of a case-insensitive substring in a string
strrpos() - Find the position of the last occurrence of a substring in a string
strripos() - Find the position of the last occurrence of a case-insensitive substring in a string
strstr() - Find the first occurrence of a string

http://php.net/manual/en/ref.strings.php

7 
$foundKey = false;
$search = 'Location';

foreach($array as $key=>$val){
    if (strstr($val, $search)) {
        $foundKey = $key;
        break;
    }
}

if ($foundKey === false) {
    // nothing found
} else {
    // see $foundKey for result
}
8

You could use preg_grep() to match a pattern against the array items. This function returns an array with the matching items.

9

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