Introduction
The “Warning: strtotime() expects parameter 1 to be string” error is a common issue encountered when working with PHP. This error occurs when the strtotime() function is used with an invalid parameter. The strtotime() function is used to convert a string representation of a date and time into a Unix timestamp. This error can be solved by ensuring that the parameter passed to the strtotime() function is a valid string representation of a date and time. In this article, we will discuss the causes of this error and how to solve it.
Solution
The warning message “strtotime() expects parameter 1 to be string” indicates that the first parameter passed to the strtotime() function is not a string. The strtotime() function is used to convert a string representation of a date and time into a Unix timestamp.
To solve this issue, the first parameter passed to the strtotime() function should be a string representation of a date and time. For example, the following code would convert the string “2020-01-01 12:00:00” into a Unix timestamp:
$timestamp = strtotime(“2020-01-01 12:00:00”);
$startdate and $enddate are DateTime objects, not strings. strtotime() requires a string, and you should simply pass a string instead, like so:
$startdate = "2013-11-15";
$enddate = "2013-11-20";
I’d recommend ugprading to a higher PHP version, if possible. DateTime class is the best way to go when you’re dealing with times and dates in PHP.
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solved Warning: strtotime() expects parameter 1 to be string
If you are receiving the error Warning: strtotime() expects parameter 1 to be string, it means that you are trying to use the strtotime() function in PHP but you are not passing it a valid string. The strtotime() function is used to convert a string into a timestamp, so it needs to be passed a valid string in order to work properly.
The most common cause of this error is passing an integer or float value to the strtotime() function instead of a string. For example, if you are trying to convert a timestamp into a string, you should not pass the timestamp directly to the strtotime() function. Instead, you should convert the timestamp into a string first, then pass it to the strtotime() function.
Another common cause of this error is passing an invalid date string to the strtotime() function. The strtotime() function expects a valid date string in the format YYYY-MM-DD HH:MM:SS. If you are passing a different format, or an invalid date string, then you will get this error.
To solve this error, make sure that you are passing a valid string to the strtotime() function. If you are passing a timestamp, make sure to convert it to a string first. If you are passing a date string, make sure that it is in the correct format and that it is a valid date.