Php 对于未按预期使用对象的每个循环

我在一个对象中循环，当一个对象键等于一个字符串时，它会发出回声。但是，在

if语句中它不起作用

$get_categories = get_categories(); // gets an object (with the key)

foreach ($get_categories as $key) {
    $each_cat = $key->name;
    echo $each_cat; // echoes 'beauty', 'celebrity', 'lifestyle'
    if ($each_cat == 'fashion') { // this is FALSE, even though it prints 'fashion' above
        echo 'Yes, this is the fashion string'; // this does not get printed
    }
}

这就是它循环通过的对象：

ARRAY (SIZE=7)
  0 => 
    OBJECT(STDCLASS)[311]
      PUBLIC 'TERM_ID' => &STRING '9' (LENGTH=1)
      PUBLIC 'NAME' => &STRING 'BEAUTY' (LENGTH=6)
      PUBLIC 'SLUG' => &STRING 'BEAUTY' (LENGTH=6)
      PUBLIC 'TERM_GROUP' => STRING '0' (LENGTH=1)
      PUBLIC 'TERM_TAXONOMY_ID' => STRING '9' (LENGTH=1)
      PUBLIC 'TAXONOMY' => STRING 'CATEGORY' (LENGTH=8)
      PUBLIC 'DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'PARENT' => &STRING '0' (LENGTH=1)
      PUBLIC 'COUNT' => &STRING '1' (LENGTH=1)
      PUBLIC 'CAT_ID' => &STRING '9' (LENGTH=1)
      PUBLIC 'CATEGORY_COUNT' => &STRING '1' (LENGTH=1)
      PUBLIC 'CATEGORY_DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'CAT_NAME' => &STRING 'BEAUTY' (LENGTH=6)
      PUBLIC 'CATEGORY_NICENAME' => &STRING 'BEAUTY' (LENGTH=6)
      PUBLIC 'CATEGORY_PARENT' => &STRING '0' (LENGTH=1)
  1 => 
    OBJECT(STDCLASS)[310]
      PUBLIC 'TERM_ID' => &STRING '11' (LENGTH=2)
      PUBLIC 'NAME' => &STRING 'CELEBRITY' (LENGTH=9)
      PUBLIC 'SLUG' => &STRING 'CELEBRITY' (LENGTH=9)
      PUBLIC 'TERM_GROUP' => STRING '0' (LENGTH=1)
      PUBLIC 'TERM_TAXONOMY_ID' => STRING '11' (LENGTH=2)
      PUBLIC 'TAXONOMY' => STRING 'CATEGORY' (LENGTH=8)
      PUBLIC 'DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'PARENT' => &STRING '0' (LENGTH=1)
      PUBLIC 'COUNT' => &STRING '3' (LENGTH=1)
      PUBLIC 'CAT_ID' => &STRING '11' (LENGTH=2)
      PUBLIC 'CATEGORY_COUNT' => &STRING '3' (LENGTH=1)
      PUBLIC 'CATEGORY_DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'CAT_NAME' => &STRING 'CELEBRITY' (LENGTH=9)
      PUBLIC 'CATEGORY_NICENAME' => &STRING 'CELEBRITY' (LENGTH=9)
      PUBLIC 'CATEGORY_PARENT' => &STRING '0' (LENGTH=1)
  3 => 
    OBJECT(STDCLASS)[308]
      PUBLIC 'TERM_ID' => &STRING '4' (LENGTH=1)
      PUBLIC 'NAME' => &STRING 'FASHION' (LENGTH=7)
      PUBLIC 'SLUG' => &STRING 'FASHION' (LENGTH=7)
      PUBLIC 'TERM_GROUP' => STRING '0' (LENGTH=1)
      PUBLIC 'TERM_TAXONOMY_ID' => STRING '4' (LENGTH=1)
      PUBLIC 'TAXONOMY' => STRING 'CATEGORY' (LENGTH=8)
      PUBLIC 'DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'PARENT' => &STRING '0' (LENGTH=1)
      PUBLIC 'COUNT' => &STRING '4' (LENGTH=1)
      PUBLIC 'CAT_ID' => &STRING '4' (LENGTH=1)
      PUBLIC 'CATEGORY_COUNT' => &STRING '4' (LENGTH=1)
      PUBLIC 'CATEGORY_DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'CAT_NAME' => &STRING 'FASHION' (LENGTH=7)
      PUBLIC 'CATEGORY_NICENAME' => &STRING 'FASHION' (LENGTH=7)
      PUBLIC 'CATEGORY_PARENT' => &STRING '0' (LENGTH=1)
  5 => 
    OBJECT(STDCLASS)[306]
      PUBLIC 'TERM_ID' => &STRING '10' (LENGTH=2)
      PUBLIC 'NAME' => &STRING 'LIFESTYLE' (LENGTH=9)
      PUBLIC 'SLUG' => &STRING 'LIFESTYLE' (LENGTH=9)
      PUBLIC 'TERM_GROUP' => STRING '0' (LENGTH=1)
      PUBLIC 'TERM_TAXONOMY_ID' => STRING '10' (LENGTH=2)
      PUBLIC 'TAXONOMY' => STRING 'CATEGORY' (LENGTH=8)
      PUBLIC 'DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'PARENT' => &STRING '0' (LENGTH=1)
      PUBLIC 'COUNT' => &STRING '3' (LENGTH=1)
      PUBLIC 'CAT_ID' => &STRING '10' (LENGTH=2)
      PUBLIC 'CATEGORY_COUNT' => &STRING '3' (LENGTH=1)
      PUBLIC 'CATEGORY_DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'CAT_NAME' => &STRING 'LIFESTYLE' (LENGTH=9)
      PUBLIC 'CATEGORY_NICENAME' => &STRING 'LIFESTYLE' (LENGTH=9)
      PUBLIC 'CATEGORY_PARENT' => &STRING '0' (LENGTH=1)
  6 => 
    OBJECT(STDCLASS)[305]
      PUBLIC 'TERM_ID' => &STRING '1' (LENGTH=1)
      PUBLIC 'NAME' => &STRING 'NONE' (LENGTH=4)
      PUBLIC 'SLUG' => &STRING 'NONE' (LENGTH=4)
      PUBLIC 'TERM_GROUP' => STRING '0' (LENGTH=1)
      PUBLIC 'TERM_TAXONOMY_ID' => STRING '1' (LENGTH=1)
      PUBLIC 'TAXONOMY' => STRING 'CATEGORY' (LENGTH=8)
      PUBLIC 'DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'PARENT' => &STRING '0' (LENGTH=1)
      PUBLIC 'COUNT' => &STRING '2' (LENGTH=1)
      PUBLIC 'CAT_ID' => &STRING '1' (LENGTH=1)
      PUBLIC 'CATEGORY_COUNT' => &STRING '2' (LENGTH=1)
      PUBLIC 'CATEGORY_DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'CAT_NAME' => &STRING 'NONE' (LENGTH=4)
      PUBLIC 'CATEGORY_NICENAME' => &STRING 'NONE' (LENGTH=4)
      PUBLIC 'CATEGORY_PARENT' => &STRING '0' (LENGTH=1)
  8 => 
    OBJECT(STDCLASS)[303]
      PUBLIC 'TERM_ID' => &STRING '16' (LENGTH=2)
      PUBLIC 'NAME' => &STRING 'TOP' (LENGTH=3)
      PUBLIC 'SLUG' => &STRING 'TOP' (LENGTH=3)
      PUBLIC 'TERM_GROUP' => STRING '0' (LENGTH=1)
      PUBLIC 'TERM_TAXONOMY_ID' => STRING '16' (LENGTH=2)
      PUBLIC 'TAXONOMY' => STRING 'CATEGORY' (LENGTH=8)
      PUBLIC 'DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'PARENT' => &STRING '0' (LENGTH=1)
      PUBLIC 'COUNT' => &STRING '2' (LENGTH=1)
      PUBLIC 'CAT_ID' => &STRING '16' (LENGTH=2)
      PUBLIC 'CATEGORY_COUNT' => &STRING '2' (LENGTH=1)
      PUBLIC 'CATEGORY_DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'CAT_NAME' => &STRING 'TOP' (LENGTH=3)
      PUBLIC 'CATEGORY_NICENAME' => &STRING 'TOP' (LENGTH=3)
      PUBLIC 'CATEGORY_PARENT' => &STRING '0' (LENGTH=1)
  9 => 
    OBJECT(STDCLASS)[302]
      PUBLIC 'TERM_ID' => &STRING '8' (LENGTH=1)
      PUBLIC 'NAME' => &STRING 'TRENDS' (LENGTH=6)
      PUBLIC 'SLUG' => &STRING 'TRENDS' (LENGTH=6)
      PUBLIC 'TERM_GROUP' => STRING '0' (LENGTH=1)
      PUBLIC 'TERM_TAXONOMY_ID' => STRING '8' (LENGTH=1)
      PUBLIC 'TAXONOMY' => STRING 'CATEGORY' (LENGTH=8)
      PUBLIC 'DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'PARENT' => &STRING '4' (LENGTH=1)
      PUBLIC 'COUNT' => &STRING '1' (LENGTH=1)
      PUBLIC 'CAT_ID' => &STRING '8' (LENGTH=1)
      PUBLIC 'CATEGORY_COUNT' => &STRING '1' (LENGTH=1)
      PUBLIC 'CATEGORY_DESCRIPTION' => &STRING '' (LENGTH=0)
      PUBLIC 'CAT_NAME' => &STRING 'TRENDS' (LENGTH=6)
      PUBLIC 'CATEGORY_NICENAME' => &STRING 'TRENDS' (LENGTH=6)
      PUBLIC 'CATEGORY_PARENT' => &STRING '4' (LENGTH=1)

尝试

这里
$key
是数组索引
0,1,2…
$val
是作为对象的那些键的对应值

因此，在本例中，执行
$key->name
不会返回任何内容

if ($each_cat == 'fashion') 

代码块是正确的，因为您的echo显示它们都是小写的，如果您查看变量dump，它们都是大写的，包括PUBLIC、Key name等。它们不应该大写
 ‘时尚’fashion‘try:
if（strtolower（$each_cat）=‘fashion’）{
是的，很好的一点，区分大小写也需要注意！！小写的字符串可以工作。但是要反转它，
$each_cat=='FASHION'
返回false？你能再次检查它在返回的数组中是否不在小写吗？对不起，我不明白？如果数组返回的是大写的'FASHION'，我如何将它与strin进行比较g'FASHION'返回false？但是通过使数组小写，可以将其与'FASHION'进行比较？
if ($each_cat == 'fashion')