08-02-2017
To back up what my learned friend RudiC says, the reason is that the underscore is not seen as delimiting the end of the variable. It is an allowable character in the variable name, so you will end up evaluating $x_report which is probably not set, so you will always try to get Daily_rose_.csv If the file had used hyphens instead of underscores then you would have got away with it, but only by luck.
Some shells also have limitations on arguments, e.g. $1. As a minor war-story, I had to debug a script once which accepted ten arguments and referred to $10 It took me ages to work out was that $10 was actually the value of $1 followed by a zero and this was required by some odd processing in the script. When it needed to use the value of $10, the author had done a shift and referred to $9 instead confusing everything else as the script looped.
The escape from this madness was to use ${10} and remove the shift, so it is good practice to wrap variable names in {} anyway.
Kind regards,
Robin
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LEARN ABOUT PHP
ftp_get_option
FTP_GET_OPTION(3) 1 FTP_GET_OPTION(3)
ftp_get_option - Retrieves various runtime behaviours of the current FTP stream
SYNOPSIS
mixed ftp_get_option (resource $ftp_stream, int $option)
DESCRIPTION
This function returns the value for the requested $option from the specified FTP connection.
PARAMETERS
o $ftp_stream
- The link identifier of the FTP connection.
o $option
- Currently, the following options are supported:
Supported runtime FTP options
+----------------+---------------------------------------------------+
| | |
|FTP_TIMEOUT_SEC | |
| | |
| | Returns the current timeout used for network |
| | related operations. |
| | |
| | |
| FTP_AUTOSEEK | |
| | |
| | Returns TRUE if this option is on, FALSE other- |
| | wise. |
| | |
+----------------+---------------------------------------------------+
RETURN VALUES
Returns the value on success or FALSE if the given $option is not supported. In the latter case, a warning message is also thrown.
EXAMPLES
Example #1
ftp_get_option(3) example
<?php
// Get the timeout of the given FTP stream
$timeout = ftp_get_option($conn_id, FTP_TIMEOUT_SEC);
?>
SEE ALSO
ftp_set_option(3).
PHP Documentation Group FTP_GET_OPTION(3)