PHP：数组值的比较不起作用？
我试图比较数组值，如果找到值PHP：数组值的比较不起作用？,php,for-loop,foreach,Php,For Loop,Foreach,我试图比较数组值，如果找到值if（isset（$row['height']）==['3455']）则打印数组值，但它不起作用。它返回所有数组，其中也包括不匹配的值。 如何比较一个值和如果找到值，则打印数组的单个值而不是所有值 这是我的打印值 Array ( [0] => Array ( [id] => 1 [name] => Bradeley Hall Pool [postcode]
if（isset（$row['height']）==['3455']）Array
(
[0] => Array
(
[id] => 1
[name] => Bradeley Hall Pool
[postcode] => CW1 5QN
[lat] => 53.10213
[lon] => -2.41069
[size] => 1.60
[pegs] => 21
[distance] => 26.6
[suitability] => Array
(
[0] => Array
(
[species] => Barbel
[species] => 1
[record] => 1
[weight] => 2.721554
[length] => 40
[height] => ['abc','345m','3455']
)
)
)
[1] => Array
(
[id] => 2
[name] => Farm Pool
[postcode] => CW9 6JQ
[lat] => 53.320502
[lon] => -2.549049
[size] => 0.88
[pegs] => 8
[distance] => 15.4
[suitability] => Array
(
[0] => Array
(
[species] => Barbel
[species] => 1
[record] => 1
[weight] => 2.721554
[length] => 40
[height] => ['33','3455','3mnc']
)
)
)
)
foreach( $cursor as $row){
foreach ($row['suitability'] as $item) {
if(isset($item['height']) == ['3455']){
echo 'yes';
echo '<pre>';
print_r($item['height']);
} else{
echo 'no';
}
}
}
foreach（$cursor作为$row）{
foreach（$row['fitability']作为$item）{
如果（isset（$item['height']）=['3455']）{
回应“是”；
<?php
foreach($cursor as $row){
// Check if the row has the key `suitability`.
if (isset($row['suitability'])) {
foreach ($row['suitability'] as $item) {
// Check if the item has the key `height`.
if (isset($item['height'])) {
// Assuming `height` is always an array.
if (in_array('3455', $item['height']) {
// Yes.
}
}
}
}
}
回声'；
<?php
foreach($cursor as $row){
// Check if the row has the key `suitability`.
if (isset($row['suitability'])) {
foreach ($row['suitability'] as $item) {
// Check if the item has the key `height`.
if (isset($item['height'])) {
// Assuming `height` is always an array.
if (in_array('3455', $item['height']) {
// Yes.
}
}
}
}
}
打印（$item['height']）；
}否则{
回应‘否’；
<?php
foreach($cursor as $row){
// Check if the row has the key `suitability`.
if (isset($row['suitability'])) {
foreach ($row['suitability'] as $item) {
// Check if the item has the key `height`.
if (isset($item['height'])) {
// Assuming `height` is always an array.
if (in_array('3455', $item['height']) {
// Yes.
}
}
}
}
}
}
}
}
isset检查高度
数组中的特定值
foreach( $cursor as $row){
foreach ($row['suitability'] as $suit) {
// can we find the string in there somewhere
if (strpos($suit['height'], '3455') !== false) {
echo 'yes ';
echo $suit['height'];
echo PHP_EOL;
} else{
echo 'no';
}
}
}
我认为最明显的问题可能是[height]=>['abc'，'345m'，'3455']
不是数组，否则print\u r（）
会将其显示为一个数组。所以它一定是一根弦
所以这是可行的
isset
返回布尔值（TRUE或FALSE）因此，如果要检查数组中是否有值-，它将永远不会等于包含一项任何内容的数组。因为它给出了错误未定义索引：height
，所以我将如何进行比较？在某些情况下，height数组也包含单个值，而不是多个值array@RiggsFolly ,由于PHP对非严格比较进行了奇怪的转换：）（我的意思是这样做没有任何意义，只是说。）而且您没有$row['height']
，但是您可能有一个$item['height']
它不起作用，在数组中不给出错误（[height]=>['abc'、'345m'、'3455']
）高度是一个数组。它有时不是数组吗？