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  1. stackoverflow.com

    Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.
  2. slingacademy.com

    Jan 13, 2024Here are several steps to take when dealing with undefined array keys warning in PHP: 1. Initialize Your Array Keys Always ensure all the keys you plan to use are set in your array, even if you have to initialize them with a NULL value or an empty string. This way, any future attempt to access these keys won't result in a warning. 2. Check Key Existence before Access Before you try to read ...
  3. stackoverflow.com

    CREATE TABLE users ( id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, username VARCHAR (50) NOT NULL UNIQUE, password VARCHAR (255) NOT NULL, created_at DATETIME DEFAULT CURRENT_TIMESTAMP ); CREATE TABLE details ( id INT NOT NULL PRIMARY KEY, first_name VARCHAR (30) NOT NULL, last_name VARCHAR (30) NOT NULL, email VARCHAR (70) NOT NULL UNIQUE, age ...
  4. To reproduce the warning message 'Undefined array key 0', follow these steps: Write PHP code that includes an if statement. Inside the if statement, attempt to access an element in an array using the key '0'. Run the code, and if the array does not have an element with the key '0', the warning message 'Undefined array key 0' will be displayed ...
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  1. you can directly use count() of the collection class.

    if($companies->count() > 0)

    Use below code, when the relation is one-to-one

    if($companies)

    --divyaraj ciesto

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