PHP searching a multidemisional array by key
I would like to search through a multidimensional array and return the value of the first key found. For example I am working with some geo tools and it returns this array. How can I recursively go through this array and return the first value of any key with the name lat? I tried array_walk but that seems to just return true or false. I tried array_filter but I dont think that is what its for? But I dont know how many sub arrays the array will have, so I need it to just go through each array set until it finds the key Im looking for, return the value and be done.
array(4) {
["bounds"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
["location_type"]=>
string(11) "APPROXIMATE"
["viewport"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
}
Here is an example of using array_filter. It works, only if I echo the value, but I want to return the value to use it at a different time. But when I do a return, it returns the whole sub array:
function getLat($k,$v)
{
if(is_array($k)){
foreach($k AS $key => $value)
{
if($key == 'lat')
{
echo $value;
}
}}
}
$test = array_filter($response,'getLat',ARRAY_FILTER_USE_BOTH);
That echos 37.8215929. Which is what I want, but want to return it. When I change echo to return it returns this:
array(1) {
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
}
php multidimensional-array array-filter array-walk
asked Jan 19 at 23:54
JohnJohn
4,2211975126
add a comment |
I would like to search through a multidimensional array and return the value of the first key found. For example I am working with some geo tools and it returns this array. How can I recursively go through this array and return the first value of any key with the name lat? I tried array_walk but that seems to just return true or false. I tried array_filter but I dont think that is what its for? But I dont know how many sub arrays the array will have, so I need it to just go through each array set until it finds the key Im looking for, return the value and be done.
array(4) {
["bounds"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
["location_type"]=>
string(11) "APPROXIMATE"
["viewport"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
}
Here is an example of using array_filter. It works, only if I echo the value, but I want to return the value to use it at a different time. But when I do a return, it returns the whole sub array:
function getLat($k,$v)
{
if(is_array($k)){
foreach($k AS $key => $value)
{
if($key == 'lat')
{
echo $value;
}
}}
}
$test = array_filter($response,'getLat',ARRAY_FILTER_USE_BOTH);
That echos 37.8215929. Which is what I want, but want to return it. When I change echo to return it returns this:
array(1) {
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
}
php multidimensional-array array-filter array-walk
asked Jan 19 at 23:54
JohnJohn
4,2211975126
The correct behavior ofarray_filteris to return an array. Have you tired usingreturn $value;instead ofecho $value;in your function?
– Enrico Dias
Jan 20 at 0:03
@EnricoDias Yeah I updated my question with the example of the array_filter function I tried to use. I replaced return with echo and it returns the whole sub array instead of the specific value of that key.
– John
Jan 20 at 0:10
add a comment |
I would like to search through a multidimensional array and return the value of the first key found. For example I am working with some geo tools and it returns this array. How can I recursively go through this array and return the first value of any key with the name lat? I tried array_walk but that seems to just return true or false. I tried array_filter but I dont think that is what its for? But I dont know how many sub arrays the array will have, so I need it to just go through each array set until it finds the key Im looking for, return the value and be done.
array(4) {
["bounds"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
["location_type"]=>
string(11) "APPROXIMATE"
["viewport"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
}
Here is an example of using array_filter. It works, only if I echo the value, but I want to return the value to use it at a different time. But when I do a return, it returns the whole sub array:
function getLat($k,$v)
{
if(is_array($k)){
foreach($k AS $key => $value)
{
if($key == 'lat')
{
echo $value;
}
}}
}
$test = array_filter($response,'getLat',ARRAY_FILTER_USE_BOTH);
That echos 37.8215929. Which is what I want, but want to return it. When I change echo to return it returns this:
array(1) {
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
}
php multidimensional-array array-filter array-walk
asked Jan 19 at 23:54
JohnJohn
4,2211975126
I would like to search through a multidimensional array and return the value of the first key found. For example I am working with some geo tools and it returns this array. How can I recursively go through this array and return the first value of any key with the name lat? I tried array_walk but that seems to just return true or false. I tried array_filter but I dont think that is what its for? But I dont know how many sub arrays the array will have, so I need it to just go through each array set until it finds the key Im looking for, return the value and be done.
array(4) {
["bounds"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
["location_type"]=>
string(11) "APPROXIMATE"
["viewport"]=>
array(2) {
["northeast"]=>
array(2) {
["lat"]=>
float(37.8468559)
["lng"]=>
float(-121.891768)
}
["southwest"]=>
array(2) {
["lat"]=>
float(37.779857)
["lng"]=>
float(-122.027307)
}
}
}
Here is an example of using array_filter. It works, only if I echo the value, but I want to return the value to use it at a different time. But when I do a return, it returns the whole sub array:
function getLat($k,$v)
{
if(is_array($k)){
foreach($k AS $key => $value)
{
if($key == 'lat')
{
echo $value;
}
}}
}
$test = array_filter($response,'getLat',ARRAY_FILTER_USE_BOTH);
That echos 37.8215929. Which is what I want, but want to return it. When I change echo to return it returns this:
array(1) {
["location"]=>
array(2) {
["lat"]=>
float(37.8215929)
["lng"]=>
float(-121.9999606)
}
}
php multidimensional-array array-filter array-walk
php multidimensional-array array-filter array-walk
asked Jan 19 at 23:54
JohnJohn
4,2211975126
asked Jan 19 at 23:54
JohnJohn
4,2211975126
edited Jan 20 at 0:00
John
asked Jan 19 at 23:54
JohnJohn
4,2211975126
asked Jan 19 at 23:54
JohnJohn
4,2211975126
asked Jan 19 at 23:54
JohnJohn
4,2211975126
4,2211975126
The correct behavior ofarray_filteris to return an array. Have you tired usingreturn $value;instead ofecho $value;in your function?
– Enrico Dias
Jan 20 at 0:03
@EnricoDias Yeah I updated my question with the example of the array_filter function I tried to use. I replaced return with echo and it returns the whole sub array instead of the specific value of that key.
– John
Jan 20 at 0:10
add a comment |
The correct behavior ofarray_filteris to return an array. Have you tired usingreturn $value;instead ofecho $value;in your function?
– Enrico Dias
Jan 20 at 0:03
@EnricoDias Yeah I updated my question with the example of the array_filter function I tried to use. I replaced return with echo and it returns the whole sub array instead of the specific value of that key.
– John
Jan 20 at 0:10
The correct behavior of
array_filter is to return an array. Have you tired using return $value; instead of echo $value; in your function?– Enrico Dias
Jan 20 at 0:03
The correct behavior of
array_filter is to return an array. Have you tired using return $value; instead of echo $value; in your function?– Enrico Dias
Jan 20 at 0:03
@EnricoDias Yeah I updated my question with the example of the array_filter function I tried to use. I replaced return with echo and it returns the whole sub array instead of the specific value of that key.
– John
Jan 20 at 0:10
@EnricoDias Yeah I updated my question with the example of the array_filter function I tried to use. I replaced return with echo and it returns the whole sub array instead of the specific value of that key.
– John
Jan 20 at 0:10
add a comment |
1 Answer
1
active
oldest
votes
Use the use keyword and an anonymous function with array_walk_recursive:
$return_value = null;
array_walk_recursive($array, function ($item, $key) use (&$return_value) {
if($key === "lat") {
$return_value = $item;
}
});
return $return_value;
Pass a reference (&) to change a variable (in this case $return_value) outside the closure (anonymous function).
answered Jan 20 at 0:07
LaurensLaurens
1,699617
add a comment |
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1 Answer
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oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Use the use keyword and an anonymous function with array_walk_recursive:
$return_value = null;
array_walk_recursive($array, function ($item, $key) use (&$return_value) {
if($key === "lat") {
$return_value = $item;
}
});
return $return_value;
Pass a reference (&) to change a variable (in this case $return_value) outside the closure (anonymous function).
answered Jan 20 at 0:07
LaurensLaurens
1,699617
add a comment |
Use the use keyword and an anonymous function with array_walk_recursive:
$return_value = null;
array_walk_recursive($array, function ($item, $key) use (&$return_value) {
if($key === "lat") {
$return_value = $item;
}
});
return $return_value;
Pass a reference (&) to change a variable (in this case $return_value) outside the closure (anonymous function).
answered Jan 20 at 0:07
LaurensLaurens
1,699617
add a comment |
Use the use keyword and an anonymous function with array_walk_recursive:
$return_value = null;
array_walk_recursive($array, function ($item, $key) use (&$return_value) {
if($key === "lat") {
$return_value = $item;
}
});
return $return_value;
Pass a reference (&) to change a variable (in this case $return_value) outside the closure (anonymous function).
answered Jan 20 at 0:07
LaurensLaurens
1,699617
Use the use keyword and an anonymous function with array_walk_recursive:
$return_value = null;
array_walk_recursive($array, function ($item, $key) use (&$return_value) {
if($key === "lat") {
$return_value = $item;
}
});
return $return_value;
Pass a reference (&) to change a variable (in this case $return_value) outside the closure (anonymous function).
answered Jan 20 at 0:07
LaurensLaurens
1,699617
answered Jan 20 at 0:07
LaurensLaurens
1,699617
answered Jan 20 at 0:07
LaurensLaurens
1,699617
answered Jan 20 at 0:07
LaurensLaurens
1,699617
1,699617
add a comment |
add a comment |
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The correct behavior of
array_filteris to return an array. Have you tired usingreturn $value;instead ofecho $value;in your function?– Enrico Dias
Jan 20 at 0:03
@EnricoDias Yeah I updated my question with the example of the array_filter function I tried to use. I replaced return with echo and it returns the whole sub array instead of the specific value of that key.
– John
Jan 20 at 0:10