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In PHP, die is a miscellaneous function used to output a message and exit the current script. The syntax is "die(status)"; this function is an alias of the exit() function, and the parameters are used for Specifies the message or status number to be written before exiting the script.
The operating environment of this tutorial: windows10 system, PHP7.1 version, DELL G3 computer
die(status)status Required. Specifies the message or status number to be written before exiting the script. Status numbers are not written to the output. DescriptionIf status is a string, the function will output the string before exiting. If status is an integer, this value will be used as the exit status. The exit status value is between 0 and 254. Exit status 255 is reserved by PHP and will not be used. Status 0 is used to terminate the program successfully. Tips and NotesNote: If the version number of PHP is greater than or equal to 4.2.0, then when status is an integer, this parameter will not be output. Recommended learning: "
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