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help deleting rows/lines from a csv file


nottaclu

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I have a csv file.  One of the columns of data contains a number.  I need to delete all the rows, in that csv, where that columns value is not between a set min and max value.  I am a noob when it comes to csv files.  Thanks in advance for the help.

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Here is an example to clear it up my issue.  Also I cannot import into a database.

 

csv file :

Last Name, First Name, Age

Kelley, Andrew, 3

Merrifield, Abbie, 7

Chilcoat, Darren, 9

Kelley, Ryan, 4

 

I want to delete the rows of the csv file where the age is outside of the range 4-8.

 

Result:

Last Name, First Name, Age

Merrifield, Abbie, 7

Kelley, Ryan, 4

 

Thanks again!

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I would do something like this -

<?php

$file_name = 'test.csv'; // name of csv file
$lines = file($file_name,FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES); // read all the lines into an array

// callback function to filter csv lines using an index (the column in the csv line, starting at 0) and a min and max value
function _filter_csv(&$item, $key, $arg){
$values = array_map('trim',explode(',',$item)); // explode and trim values
if($values[$arg['index']]>=$arg['min'] && $values[$arg['index']]<=$arg['max']){ // test if the supplied index/column is between the min and max values inclusive
	return; // value in range, simply return (do nothing)
}
$item = ''; // value outside of range, clear value
}

array_walk($lines,'_filter_csv',array('index'=>2,'min'=>4,'max'=>); // keep values in the age (index = 2) column that are between the min and max values (4 and  inclusive
$lines = array_filter($lines); // remove empty entries

echo "<pre>",print_r($lines,true); // display result for demo purposes

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