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php - Invalid argument supplied for foreach() : Yii2

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Solution:

Since$plusone_subjects is not valid json, you can manually change it to valid json and then convert it to an array like so:

$plusone_subjects = "[$plusone_subjects]"; //covert string to valid json;
$plusone_subjects = json_decode($plusone_subjects,true); //covert to array

foreach ($plusone_subjects as $subject)
{
    echo $subject["subject_name"]; 
}
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Undefined asked

2023-09-17

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About the technologies asked in this question

PHP

PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites. The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/

Yii

Yii is a simple yet high performance generic component framework based framework. It is known for its high performance, but above all, it is famous for its simplicity. This framework appeared in December 2008. It allows you to use third-party code, and its Gii code generator allows you to quickly create basic structures from which you can build your own solutions.
https://www.yiiframework.com/

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