How does the PHP program debug? Solution Solutions

How does the PHP program debug?
Gedit+mozilla Firefox

 
 $x = "1.23ABC";
echo $x +7;           
The above part of the program is right.
The following part of the program is wrong.
Run this program in the browser, and the result is: nothing is displayed!
$y =a1.0;
if ($y)

?>

Use the above Notepad + browser to debug.
If a part of the PHP program goes wrong, the result of the entire program may not be displayed in the browser.
This makes it difficult to find a program error.
Is there any way to solve this problem?

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------Solution--------------------
To turn on PHP error notification function
Set the Display_errors=on in PHP.ini, and then restart the server.
------Solution--------------------
Add these two lines to the head of your program, without modifying the php.ini

Error_reporting (E_all);
Ini_set (' display_errors ', ' on ');

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