simple php script to save lines to columns

i started to write php script to show phones in columns:
<?php
I=0;
$fh=fopen("phones.txt,"r");
while(!feof($fh))
{
$content[]=fgets($fh);
$i++;
}
fclose ($fh);
for($line=0;$line<=$i;$line++)
{
if (strpos($content[$line]"972")!=0
{
echo "\n"."<br>";
echo $content[$line];
}
my text file […]

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