我正在循环一个对象，当一个对象键等于一个字符串时，它回应了一些东西。但是，它在if statement时无效。
$get_categories = get_categories(); // gets an object (with the key)
foreach ($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
}
}
这是它循环的对象：
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)
答案 0 :(得分：0)
尝试
foreach ($get_categories as $key=>$val) {
$each_cat = $val->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
}
}
此处$key是数组索引0,1,2...
$val是作为对象的那些键的对应值。
这样做$key->name不会返回任何内容。
if ($each_cat == 'fashion')
代码块是正确的，因为你的echo显示它们都是小写的，如果你正在查看它们都在CAPS中的变量转储，包括PUBLIC，Key name等。它们不应该大写。