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(PHP 4 >= 4.0.4, PHP 5)
shmop_write — Write data into shared memory block
$shmid 
   ,  string $data 
   ,  int $offset 
   )shmop_write() will write a string into shared memory block.
shmid The shared memory block identifier created by shmop_open()
data A string to write into shared memory block
offset Specifies where to start writing data inside the shared memory segment.
   The size of the written data, or  FALSE  on 
   failure.
  
Example #1 Writing to shared memory block
  <?php
$shm_bytes_written  =  shmop_write ( $shm_id ,  $my_string ,  0 );
 ?>   This example will write data inside $my_string into shared memory block, $shm_bytes_written will contain the number of bytes written.