SplFileObject::key
(PHP 5 >= 5.1.0, PHP 7)
SplFileObject::key — Get line number
Description
public int SplFileObject::key ( void )Gets the current line number.
Note: This number may not reflect the actual line number in the file if SplFileObject::setMaxLineLen() is used to read fixed lengths of the file.
Parameters
This function has no parameters.
Return Values
Returns the current line number.
Examples
Example #1 SplFileObject::key() example
<?php
$file?=?new?SplFileObject("lipsum.txt");
foreach?($file?as?$line)?{
????echo?$file->key()?.?".?"?.?$line;
}
?>The above example will output something similar to:
0. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
1. Duis nec sapien felis, ac sodales nisl.
2. Lorem ipsum dolor sit amet, consectetur adipiscing elit.Example #2 SplFileObject::key() example with SplFileObject::setMaxLineLen()
<?php
$file?=?new?SplFileObject("lipsum.txt");
$file->setMaxLineLen(20);
foreach?($file?as?$line)?{
????echo?$file->key()?.?".?"?.?$line?.?"\n";
}
?>The above example will output something similar to:
0. Lorem ipsum dolor s
1. it amet, consectetu
2. r adipiscing elit.
3.
4. Duis nec sapien fel
5. is, ac sodales nisl
6. .
7. Lorem ipsum dolor s
8. it amet, consectetu
9. r adipiscing elit.See Also
- SplFileObject::current() - Retrieve current line of file
- SplFileObject::seek() - Seek to specified line
- SplFileObject::next() - Read next line
- SplFileObject::rewind() - Rewind the file to the first line
- SplFileObject::valid() - Not at EOF
← SplFileObject::hasChildren
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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