代码之家 › 专栏 › 技术社区 › Gislef

Foreach URL JSON解码

json php

Gislef · 技术社区 · 8 年前

$urlsDB 是包含JSON的变量。

print_r($urlsDB );

[\"http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/LOGO-SEG-2.png\",\"http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/algoritims.jpg\"]

如何创建 foreach 使用 json_decode 正确地

   <?php
    $urls = json_decode($urlsDB , true);

    if ($urls != '' ) { 

            foreach ($urls as $url) {
    ?>
    <img src="<?php echo $url;?>"  class="img-responsive img-thumbnail " />

    <?php
     }
    }

    ?>

Var_dump($urls);

2 回复 | 直到 8 年前

ishegg 8 年前

您得到的JSON无效。您在开头和结尾转义了引号。这是有效的:

["http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/LOGO-SEG-2.png","http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/algoritims.jpg"]

这应该是可行的:

<?php
$a = '["http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/LOGO-SEG-2.png","http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/algoritims.jpg"]
';
$urls = json_decode($a, true);
if (count($urls) > 0) {
    foreach ($urls as $url) {
    ?>
        <img src="<?php echo $url;?>"  class="img-responsive img-thumbnail " />
    <?php
    }
}

你不应该 htmlspecialchars() JSON编码的字符串。这将转义引号,使JSON对象无效。你应该做的是 htmlspecialchars() here ).

William Perron 8 年前

json_decode()

$input = '[\"http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/LOGO-SEG-2.png\",\"http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/algoritims.jpg\"]';

$json = json_decode(stripslashes($input),true);

的输出 var_dump($json)

array(2) {
    [0]=> string(64) "http://localhost/theme/wp-content/uploads/2017/08/LOGO-SEG-2.png"
    [1]=> string(64) "http://localhost/theme/wp-content/uploads/2017/08/algoritims.jpg"
}

试试看 here

编辑以添加:

原始字符串实际上是json数组的字符串表示,而不是对象,因为它没有键。我用一个 url

$input = '[{\"url\" : \"http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/LOGO-SEG-2.png\"},{\"url\" : \"http:\\/\\/localhost\\/theme\\/wp-content\\/uploads\\/2017\\/08\\/algoritims.jpg\"}]';

$json = json_decode(stripslashes($input),true);

array(2) {
    [0]=> array(1) {
        ["url"]=> string(64) "http://localhost/theme/wp-content/uploads/2017/08/LOGO-SEG-2.png"
    }
    [1]=> array(1) {
        ["url"]=> string(64) "http://localhost/theme/wp-content/uploads/2017/08/algoritims.jpg"
    }
}

\" 是 " $encoded = "{\"some value\"}"; ).

echo var_dump(json_decode('{\"myKey\": \"myValue\"}', true)); // output: NULL

试试看 live .