Reading a File


<PRE><? readfile("/proc/cpuinfo");?></PRE>

Output:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 44
model name	: Intel(R) Xeon(R) CPU           X5650  @ 2.67GHz
stepping	: 2
cpu MHz		: 2659.999
cache size	: 12288 KB
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc up ida nonstop_tsc arat pni ssse3 cx16 sse4_1 sse4_2 popcnt lahf_lm
bogomips	: 5319.99
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


<?

  $file = fopen("sample.txt", "r");


  while (!feof($file)) {
    echo fgets($file, 1024), "<BR>";
}
?>

Reading from a URL


<? $file = fopen("http://www.php.net/file.txt", "r"); ?>

Writing to a file


<?
$file = fopen("agent.log", "a");
fputs($file, $HTTP_USER_AGENT."\n");
?>