How to solve PHP error Notice Array to string conversion in

Question

I have a PHP file that tries to echo a   POST and I get an error  here is the code   echo   lt html gt    echo   lt body gt    for  i 0   i lt 5  i         echo   lt input name  C    value   Texting  i                  style  background-color  D0A9F5   gt  lt  input gt       echo   lt  body gt    echo   lt  html gt    echo   lt input type  submit  value  Save The Table  name  G  gt  lt  input gt     Here is the code to echo the POST   if  empty   POST  G          echo   POST  C        But when the code runs I get an error like   Notice  Array to string conversion in  C  xampp htdocs PHIS FinalSubmissionOfTheFormPHP php on line 8   What does this error mean and how do I fix it

User · Answer

Array to string conversion in latest versions of php 7 x is error  rather than notice  and prevents further code execution  Using print  echo on array is not an option anymore  Suppressing errors and notices is not a good practice  especially when in development environment and still debugging code  Use var dump print r  iterate through input value using foreach or for to output input data for names that are declared as input arrays   name     Most common practice to catch errors is using try catch blocks  that helps us prevent interruption of code execution that might cause possible errors wrapped within try block    try     wrap around possible cause of error or notice          if  empty   POST  C              echo   POST  C              catch Exception  e          handle the error message  e- gt getMessage

User · Answer

What the PHP Notice means and how to reproduce it  If you send a PHP array into a function that expects a string like  echo or print  then the PHP interpreter will convert your array to the literal string Array  throw this Notice and keep going   For example  php gt  print array 1 2 3    PHP Notice   Array to string conversion in   usr local lib python2 7 dist-packages phpsh phpsh php 591    eval   d code on line 1 Array  In this case  the function print dumps the literal string  Array to stdout and then logs the Notice to stderr and keeps going  Another example in a PHP script   lt  php      stuff   array 1 2 3       print  stuff     PHP Notice   Array to string conversion in yourfile on line 3   gt   Correction 1  use foreach loop to access array elements http   php net foreach  stuff   array 1 2 3   foreach   stuff as  value        echo  value   quot  n quot      Prints  1 2 3  Or along with array keys  stuff   array  name    gt   Joe    email    gt   joe example com    foreach   stuff as  key   gt   value        echo  quot  key   value n quot      Prints  name  Joe email  joe example com  Note that array elements could be arrays as well  In this case either use foreach again or access this inner array elements using array syntax  e g   row  name   Correction 2  Joining all the cells in the array together  In case it s just a plain 1-demensional array  you can simply join all the cells into a string using a delimiter   lt  php      stuff   array 1 2 3       print implode  quot    quot    stuff        prints 1  2  3     print join       stuff            prints 1 2 3  Correction 3  Stringify an array with complex structure  In case your array has a complex structure but you need to convert it to a string anyway  then use http   php net json encode  stuff   array  name    gt   Joe    email    gt   joe example com    print json encode  stuff    Prints   quot name quot   quot Joe quot   quot email quot   quot joe example com quot    A quick peek into array structure  use the builtin php functions If you want just to inspect the array contents for the debugging purpose  use one of the following functions  Keep in mind that var dump is most informative of them and thus usually being preferred for the purpose  http   php net print r http   php net var dump http   php net var export  examples  stuff   array 1 2 3   print r  stuff    stuff   array 3 4 5   var dump  stuff    Prints  Array        0    gt  1      1    gt  2      2    gt  3   array 3       0   gt    int 3     1   gt    int 4     2   gt    int 5

User · Answer

You are using  lt input name  C    in your HTML  This creates an array in PHP when the form is sent   You are using echo   POST  C    to echo that array - this will not work  but instead emit that notice and the word  Array    Depending on what you did with the rest of the code  you should probably use echo   POST  C   0

User · Answer

lt  php ob start    var dump   POST  C      result   ob get clean      gt    if you want to capture the result in a variable

User · Answer

When you have many HTML inputs named C   what you get in the POST array on the other end is an array of these values in   POST  C    So when you echo that  you are trying to print an array  so all it does is print Array and a notice   To print properly an array  you either loop through it and echo each element  or you can use print r   Alternatively  if you don t know if it s an array or a string or whatever  you can use var dump  var  which will tell you what type it is and what it s content is  Use that for debugging purposes only

[php] How to solve PHP error 'Notice: Array to string conversion in...'

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