If a string is not matching one of 3 option in PHP
This is the code I used to have to check if $A doesn't match $B
if($A!=$B) {
$set = array();
echo $val= str_replace('\/', '/', json_encode($set));
//echo print_r($_SERVER);
exit;
}
Now I need the opposite of this condition: ($A need to match one of these $B,$C or $D)
php arrays string-comparison
edited Jan 1 at 0:16
Funk Forty Niner
1
asked Dec 31 '18 at 22:53
daviddavid
33
add a comment |
This is the code I used to have to check if $A doesn't match $B
if($A!=$B) {
$set = array();
echo $val= str_replace('\/', '/', json_encode($set));
//echo print_r($_SERVER);
exit;
}
Now I need the opposite of this condition: ($A need to match one of these $B,$C or $D)
php arrays string-comparison
edited Jan 1 at 0:16
Funk Forty Niner
1
asked Dec 31 '18 at 22:53
daviddavid
33
add a comment |
This is the code I used to have to check if $A doesn't match $B
if($A!=$B) {
$set = array();
echo $val= str_replace('\/', '/', json_encode($set));
//echo print_r($_SERVER);
exit;
}
Now I need the opposite of this condition: ($A need to match one of these $B,$C or $D)
php arrays string-comparison
edited Jan 1 at 0:16
Funk Forty Niner
1
asked Dec 31 '18 at 22:53
daviddavid
33
This is the code I used to have to check if $A doesn't match $B
if($A!=$B) {
$set = array();
echo $val= str_replace('\/', '/', json_encode($set));
//echo print_r($_SERVER);
exit;
}
Now I need the opposite of this condition: ($A need to match one of these $B,$C or $D)
php arrays string-comparison
php arrays string-comparison
edited Jan 1 at 0:16
Funk Forty Niner
1
asked Dec 31 '18 at 22:53
daviddavid
33
edited Jan 1 at 0:16
Funk Forty Niner
1
asked Dec 31 '18 at 22:53
daviddavid
33
edited Jan 1 at 0:16
Funk Forty Niner
1
edited Jan 1 at 0:16
Funk Forty Niner
1
edited Jan 1 at 0:16
Funk Forty Niner
1
1
asked Dec 31 '18 at 22:53
daviddavid
33
asked Dec 31 '18 at 22:53
daviddavid
33
asked Dec 31 '18 at 22:53
daviddavid
33
33
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
A simple shortcut to seeing if a value matches one of multiple values you can put the values to be compared against ($B, $C, and $D) into an array and then use in_array() to see if the original value ($A) matches any of them.
if (in_array($A, [$B, $C, $D])) {
// ...
}
If you don't want it to match any of $B, $C, or $D just use !:
if (!in_array($A, [$B, $C, $D])) {
// ...
}
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
Genious! Nice work!
– Patrick Simard
Jan 1 at 0:16
add a comment |
You can use array_search
$B = 'B';
$C = 'C';
$D = 'D';
//match B
$A = 'B';
$options = [$B, $C, $D];
if (false !== ($index = array_search($A, $options ))) {
echo "Match: {$index} '{$options[$index]}'";
}
Output
Match: 0 'B'
Sandbox
The nice thing here is you can set the $index and use that to tell which one matched later.
Note you have to use false !== because array search returns the index where the match happened at, so it can happen on the first array element which is index 0. As we know PHP can treat 0 as false (in this case the condition would fail when it should pass). However, when we use the strict type check PHP also compares the type and INT 0 is not BOOL false (which passes the condition).
for reference.
http://php.net/manual/en/function.array-search.php
Another probably the most efficient way is to use isset, and use keys instead of values:
$options = [$B=>1,$C=>1,$D=>1]; //values don't matter
if(!isset($options[$A])){
//....
}
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
Why would the index matter if you are building the array solely for the purpose of matching the value against multiple operands?
– Dharman
Jan 1 at 0:27
This may not be exactly what the OP is looking for, but it works and is handy to know
– John Conde
Jan 1 at 0:32
2
@Dharman Who knows? It was just another way to solve the same problem. You could even doarray_flip(or build it with keys) and then doisset($array[$A])if you really wanted to, or evenarray_intersectetc..
– ArtisticPhoenix
Jan 1 at 0:33
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
A simple shortcut to seeing if a value matches one of multiple values you can put the values to be compared against ($B, $C, and $D) into an array and then use in_array() to see if the original value ($A) matches any of them.
if (in_array($A, [$B, $C, $D])) {
// ...
}
If you don't want it to match any of $B, $C, or $D just use !:
if (!in_array($A, [$B, $C, $D])) {
// ...
}
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
Genious! Nice work!
– Patrick Simard
Jan 1 at 0:16
add a comment |
A simple shortcut to seeing if a value matches one of multiple values you can put the values to be compared against ($B, $C, and $D) into an array and then use in_array() to see if the original value ($A) matches any of them.
if (in_array($A, [$B, $C, $D])) {
// ...
}
If you don't want it to match any of $B, $C, or $D just use !:
if (!in_array($A, [$B, $C, $D])) {
// ...
}
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
Genious! Nice work!
– Patrick Simard
Jan 1 at 0:16
add a comment |
A simple shortcut to seeing if a value matches one of multiple values you can put the values to be compared against ($B, $C, and $D) into an array and then use in_array() to see if the original value ($A) matches any of them.
if (in_array($A, [$B, $C, $D])) {
// ...
}
If you don't want it to match any of $B, $C, or $D just use !:
if (!in_array($A, [$B, $C, $D])) {
// ...
}
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
A simple shortcut to seeing if a value matches one of multiple values you can put the values to be compared against ($B, $C, and $D) into an array and then use in_array() to see if the original value ($A) matches any of them.
if (in_array($A, [$B, $C, $D])) {
// ...
}
If you don't want it to match any of $B, $C, or $D just use !:
if (!in_array($A, [$B, $C, $D])) {
// ...
}
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
answered Dec 31 '18 at 22:55
John CondeJohn Conde
185k80372423
185k80372423
Genious! Nice work!
– Patrick Simard
Jan 1 at 0:16
add a comment |
Genious! Nice work!
– Patrick Simard
Jan 1 at 0:16
Genious! Nice work!
– Patrick Simard
Jan 1 at 0:16
Genious! Nice work!
– Patrick Simard
Jan 1 at 0:16
add a comment |
You can use array_search
$B = 'B';
$C = 'C';
$D = 'D';
//match B
$A = 'B';
$options = [$B, $C, $D];
if (false !== ($index = array_search($A, $options ))) {
echo "Match: {$index} '{$options[$index]}'";
}
Output
Match: 0 'B'
Sandbox
The nice thing here is you can set the $index and use that to tell which one matched later.
Note you have to use false !== because array search returns the index where the match happened at, so it can happen on the first array element which is index 0. As we know PHP can treat 0 as false (in this case the condition would fail when it should pass). However, when we use the strict type check PHP also compares the type and INT 0 is not BOOL false (which passes the condition).
for reference.
http://php.net/manual/en/function.array-search.php
Another probably the most efficient way is to use isset, and use keys instead of values:
$options = [$B=>1,$C=>1,$D=>1]; //values don't matter
if(!isset($options[$A])){
//....
}
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
Why would the index matter if you are building the array solely for the purpose of matching the value against multiple operands?
– Dharman
Jan 1 at 0:27
This may not be exactly what the OP is looking for, but it works and is handy to know
– John Conde
Jan 1 at 0:32
2
@Dharman Who knows? It was just another way to solve the same problem. You could even doarray_flip(or build it with keys) and then doisset($array[$A])if you really wanted to, or evenarray_intersectetc..
– ArtisticPhoenix
Jan 1 at 0:33
add a comment |
You can use array_search
$B = 'B';
$C = 'C';
$D = 'D';
//match B
$A = 'B';
$options = [$B, $C, $D];
if (false !== ($index = array_search($A, $options ))) {
echo "Match: {$index} '{$options[$index]}'";
}
Output
Match: 0 'B'
Sandbox
The nice thing here is you can set the $index and use that to tell which one matched later.
Note you have to use false !== because array search returns the index where the match happened at, so it can happen on the first array element which is index 0. As we know PHP can treat 0 as false (in this case the condition would fail when it should pass). However, when we use the strict type check PHP also compares the type and INT 0 is not BOOL false (which passes the condition).
for reference.
http://php.net/manual/en/function.array-search.php
Another probably the most efficient way is to use isset, and use keys instead of values:
$options = [$B=>1,$C=>1,$D=>1]; //values don't matter
if(!isset($options[$A])){
//....
}
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
Why would the index matter if you are building the array solely for the purpose of matching the value against multiple operands?
– Dharman
Jan 1 at 0:27
This may not be exactly what the OP is looking for, but it works and is handy to know
– John Conde
Jan 1 at 0:32
2
@Dharman Who knows? It was just another way to solve the same problem. You could even doarray_flip(or build it with keys) and then doisset($array[$A])if you really wanted to, or evenarray_intersectetc..
– ArtisticPhoenix
Jan 1 at 0:33
add a comment |
You can use array_search
$B = 'B';
$C = 'C';
$D = 'D';
//match B
$A = 'B';
$options = [$B, $C, $D];
if (false !== ($index = array_search($A, $options ))) {
echo "Match: {$index} '{$options[$index]}'";
}
Output
Match: 0 'B'
Sandbox
The nice thing here is you can set the $index and use that to tell which one matched later.
Note you have to use false !== because array search returns the index where the match happened at, so it can happen on the first array element which is index 0. As we know PHP can treat 0 as false (in this case the condition would fail when it should pass). However, when we use the strict type check PHP also compares the type and INT 0 is not BOOL false (which passes the condition).
for reference.
http://php.net/manual/en/function.array-search.php
Another probably the most efficient way is to use isset, and use keys instead of values:
$options = [$B=>1,$C=>1,$D=>1]; //values don't matter
if(!isset($options[$A])){
//....
}
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
You can use array_search
$B = 'B';
$C = 'C';
$D = 'D';
//match B
$A = 'B';
$options = [$B, $C, $D];
if (false !== ($index = array_search($A, $options ))) {
echo "Match: {$index} '{$options[$index]}'";
}
Output
Match: 0 'B'
Sandbox
The nice thing here is you can set the $index and use that to tell which one matched later.
Note you have to use false !== because array search returns the index where the match happened at, so it can happen on the first array element which is index 0. As we know PHP can treat 0 as false (in this case the condition would fail when it should pass). However, when we use the strict type check PHP also compares the type and INT 0 is not BOOL false (which passes the condition).
for reference.
http://php.net/manual/en/function.array-search.php
Another probably the most efficient way is to use isset, and use keys instead of values:
$options = [$B=>1,$C=>1,$D=>1]; //values don't matter
if(!isset($options[$A])){
//....
}
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
edited Jan 1 at 0:37
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
answered Jan 1 at 0:16
ArtisticPhoenixArtisticPhoenix
15.8k11223
15.8k11223
Why would the index matter if you are building the array solely for the purpose of matching the value against multiple operands?
– Dharman
Jan 1 at 0:27
This may not be exactly what the OP is looking for, but it works and is handy to know
– John Conde
Jan 1 at 0:32
2
@Dharman Who knows? It was just another way to solve the same problem. You could even doarray_flip(or build it with keys) and then doisset($array[$A])if you really wanted to, or evenarray_intersectetc..
– ArtisticPhoenix
Jan 1 at 0:33
add a comment |
Why would the index matter if you are building the array solely for the purpose of matching the value against multiple operands?
– Dharman
Jan 1 at 0:27
This may not be exactly what the OP is looking for, but it works and is handy to know
– John Conde
Jan 1 at 0:32
2
@Dharman Who knows? It was just another way to solve the same problem. You could even doarray_flip(or build it with keys) and then doisset($array[$A])if you really wanted to, or evenarray_intersectetc..
– ArtisticPhoenix
Jan 1 at 0:33
Why would the index matter if you are building the array solely for the purpose of matching the value against multiple operands?
– Dharman
Jan 1 at 0:27
Why would the index matter if you are building the array solely for the purpose of matching the value against multiple operands?
– Dharman
Jan 1 at 0:27
This may not be exactly what the OP is looking for, but it works and is handy to know
– John Conde
Jan 1 at 0:32
This may not be exactly what the OP is looking for, but it works and is handy to know
– John Conde
Jan 1 at 0:32
2
2
@Dharman Who knows? It was just another way to solve the same problem. You could even do
array_flip (or build it with keys) and then do isset($array[$A]) if you really wanted to, or even array_intersect etc..– ArtisticPhoenix
Jan 1 at 0:33
@Dharman Who knows? It was just another way to solve the same problem. You could even do
array_flip (or build it with keys) and then do isset($array[$A]) if you really wanted to, or even array_intersect etc..– ArtisticPhoenix
Jan 1 at 0:33
add a comment |
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