Message: Trying to access array offset on value of type null [duplicate]

This happens because $cOTLdata is not null but the index 'char_data' does not exist. Previous versions of PHP may have been less strict on such mistakes and silently swallowed the error / notice while 7.4 does not do this anymore.

To check whether the index exists or not you can use isset():

isset($cOTLdata['char_data'])

Which means the line should look something like this:

$len = isset($cOTLdata['char_data']) ? count($cOTLdata['char_data']) : 0;

Note I switched the then and else cases of the ternary operator since === null is essentially what isset already does (but in the positive case).

Related Posts:

  1. Replace ' and similar html codes with their correspondent character?
  2. How to prevent the “Confirm Form Resubmission” dialog?
  3. navigate back with PHP form submission
  4. How do I make a redirect in PHP?
  5. List of All Locales and Their Short Codes?
  6. How to fix “Headers already sent” error in PHP
  7. Whoops, looks like something went wrong. Laravel 5.0
  8. “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
  9. http://localhost:80 is not working on running Apache server through UniServer ZeroXIII
  10. PDOException SQLSTATE[HY000] [2002] No such file or directory
  11. How do I get PHP errors to display?
  12. Get the full URL in PHP
  13. How do I check if a string contains a specific word?
  14. How to force file download with PHP
  15. How to Set Category Page as Home Page in Prestashop
  16. Get the full URL in PHP
  17. How to copy a file from one directory to another using PHP?
  18. Getting an error when I visit http://localhost
  19. PHP + curl, HTTP POST sample code?
  20. PHP random string generator
  21. What are the differences in die() and exit() in PHP?
  22. How to call a JavaScript function from PHP?
  23. Error 500: Premature end of script headers
  24. Cookies vs. sessions
  25. Expected status code 200 but received 500
  26. PDO with INSERT INTO through prepared statements
  27. Can you “compile” PHP code and upload a binary-ish file, which will just be run by the byte code interpreter?
  28. How to get the file extension in PHP?
  29. Invalid argument supplied for foreach()
  30. Remove the last character from a string
  31. How to prevent Browser cache for php site
  32. what does a .php?id=&value=value means?
  33. Setting up a PHP interpreter in PhpStorm
  34. When should I use ‘self’ over ‘$this’?
  35. Get Current URL in Magento and show something
  36. php create object without class
  37. Creating a search form in PHP to search a database?
  38. How do I make a simple crawler in PHP?
  39. Weird PHP error: ‘Can’t use function return value in write context’
  40. Create PDF file using PHP
  41. How do I get a YouTube video thumbnail from the YouTube API?
  42. Sort array of objects by object fields
  43. Call to undefined method mysqli_stmt::get_result
  44. retrieve data from db and display it in table in php .. see this code whats wrong with it?
  45. Count how many files in directory PHP
  46. What does it mean to escape a string?
  47. Creating default object from empty value in PHP?
  48. php foreach with multidimensional array
  49. Send attachments with PHP Mail()?
  50. header location not working in my php code
  51. PHP Error: Function name must be a string
  52. Uncaught Error: Call to undefined function mysql_escape_string()
  53. Warning: file_get_contents(): https:// wrapper is disabled in the server configuration by all
  54. Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in
  55. Convert DateTime to String PHP
  56. Warning: mysqli_query() expects at least 2 parameters, 1 given. What? [duplicate]
  57. Xampp Access Forbidden php
  58. PHP cURL custom headers
  59. File attachment with PHPMailer
  60. Warning: mysqli_query() expects parameter 1 to be mysqli, resource given
  61. Fatal error: Call to undefined function money_format()
  62. Laravel 5 MethodNotAllowedHttpException in RouteCollection.php line 201:
  63. PHP “&” operator
  64. * failed to open vchiq instance
  65. Mysql where id is in array
  66. XAMPP, using port:81, cannot run localhost:81/mywebsite
  67. How to extract and access data from JSON with PHP?
  68. What is the MM/DD/YYYY regular expression and how do I use it in php?
  69. Warning “Do not Access Superglobal $_POST Array Directly” on Netbeans 7.4 for PHP
  70. How to integrate WordPress with Angular 8 for website?
  71. Fatal error: Maximum execution time of 30 seconds exceeded
  72. cURL request in Laravel
  73. PHP array printing using a loop
  74. How to send to BCC address when using PHPMailer to format MIME message for Gmail API?
  75. Call a REST API in PHP
  76. Is there any way to test PHP locally without installing a server?
  77. How can I write php code in notepad++?
  78. PHP Redirect with POST data
  79. Getting the screen resolution using PHP
  80. PHP: fopen() Permission denied
  81. How should I be setting browscap.ini file
  82. CodeIgniter: Unable to connect to your database server using the provided settings Error Message
  83. Returning JSON from a PHP Script
  84. How to run a PHP function from an HTML form?
  85. Can I store images in MySQL 
  86. MySQL Daemon Failed to Start – centos 6
  87. How to insert TIMESTAMP into my MySQL table?
  88. How to remove index.php from WordPress site URL
  89. Remove warning messages in PHP
  90. How to generate .json file with PHP?
  91. Call to a member function on a non-object [duplicate]
  92. Generate PDF from HTML PHP
  93. Call to a member function fetch_assoc() on boolean in [duplicate]
  94. How to use Memcached with PHP7?
  95. Remove empty array elements
  96. select count(*) from table of mysql in php
  97. Auto increment in phpmyadmin
  98. Undefined index with $_POST [duplicate]
  99. file_get_contents() how to fix error “Failed to open stream”, “No such file”
  100. wordpress menu dropdown item not showing after first dropdown

Leave a Comment

error code: 521