php-fpm log location

php-fpm settings

; php80
php_flag[display_errors] = off
php_admin_flag[log_errors] = on
php_admin_value[error_log] = /var/opt/remi/php80/log/php-fpm/www-error.log

ls -ld /var/opt/remi/php80/log/php-fpm/www-error.log

drwxrwx--- 2 apache root 23 Jul  7 16:49 /var/opt/remi/php80/log/php-fpm

memory

# Returns the amount of memory allocated to PHP

memory_get_usage()

<?php
  echo memory_get_usage() . "\n"; // 36640
  $a = str_repeat("Hello", 4242);
  echo memory_get_usage() . "\n"; // 57960
  unset($a);
  echo memory_get_usage() . "\n"; // 36744
?>

# Runtime set memory limit

 * 只在 mod_php 時才有效, FPM 情況無效

ini_set('memory_limit', '16M');

php-fpm Settings

/etc/php5/fpm/php.ini

memory_limit = 256M

/etc/php5/fpm/php-fpm.conf

php_value[memory_limit] = 256M

... PHP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 268435464 bytes) in /home/vhosts/datahunter.org/public_html/tim.php on line 21

... PHP Fatal error:  Maximum execution time of 30 seconds exceeded in /home/vhosts/datahunter.org/public_html/tim.php on line 19

execution time

$start_time = microtime(true);

$end_time = microtime(true);
$execution_time = ($end_time - $start_time);

echo " Execution time: " . $execution_time . " seconds";

# us (1s=10^6)

microtime() 当前 Unix 时间戳以及微秒数

Test script

<?
error_reporting(E_ALL & ~E_NOTICE);

echo "max_execution_time: " . ini_get('max_execution_time') . PHP_EOL;
echo "memory_limit: " .  ini_get('memory_limit') . PHP_EOL;

echo memory_get_usage() . PHP_EOL;
echo "========" . PHP_EOL;

// counting
$start_time = microtime(true);

$big_array = array();
for ($i = 0; $i < 1000000; $i++)
{
        for ($j = 0; $j < 1000000; $j++)
        {
                hash('sha256', 'run time consume function');
                $big_array[] = $i;
        }
}

$end_time = microtime(true);
$execution_time = ($end_time - $start_time);

echo "Execution time: " . $execution_time . " us" . PHP_EOL;
echo "Usage: " . memory_get_usage() . PHP_EOL;
?>