Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Return true if the given function has been defined
<?php function_exists(string $function): bool<?php public function setApcuPrefix($apcuPrefix)
{
$this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
}<?php }
if (function_exists('pcntl_async_signals') && function_exists('pcntl_signal')) {
@mkdir($directory, 0777, true);
if ($realDir = realpath($directory)) {
pcntl_async_signals(true);<?php }
}
if (function_exists('sapi_windows_set_ctrl_handler') && PHP_SAPI === 'cli') {
@mkdir($directory, 0777, true);
if ($realDir = realpath($directory)) {
sapi_windows_set_ctrl_handler(function () use ($realDir) {<?php 'zip: ' . (extension_loaded('zip') ? '<comment>extension present</comment>' : '<comment>extension not loaded</comment>')
. ', ' . ($hasSystemUnzip ? '<comment>unzip present</comment>' : '<comment>unzip not available</comment>')
. ', ' . ($hasSystem7zip ? '<comment>7-Zip present ('.$bin7zip.')</comment>' : '<comment>7-Zip not available</comment>')
. (($hasSystem7zip || $hasSystemUnzip) && !function_exists('proc_open') ? ', <warning>proc_open is disabled or not present, unzip/7-z will not be usable</warning>' : '')
);
return $this->exitCode;<?php private function checkGit()
{
if (!function_exists('proc_open')) {
return '<comment>proc_open is not available, git cannot be used</comment>';
}<?php $iniMessage = PHP_EOL.PHP_EOL.IniHelper::getMessage();
$iniMessage .= PHP_EOL.'If you can not modify the ini file, you can also run `php -d option=value` to modify ini values on the fly. You can use -d multiple times.';
if (!function_exists('json_decode')) {
$errors['json'] = true;
}<?php protected function isValidEmail($email)
{
if (!function_exists('filter_var')) {
return true;
}<?php protected function execute(InputInterface $input, OutputInterface $output)
{
if (function_exists('pcntl_async_signals') && function_exists('pcntl_signal')) {
pcntl_async_signals(true);
pcntl_signal(SIGINT, array($this, 'revertComposerFile'));
pcntl_signal(SIGTERM, array($this, 'revertComposerFile'));<?php }
if (function_exists('posix_getpwuid') && function_exists('posix_geteuid')) {
$composeUser = posix_getpwuid(posix_geteuid());
$homeOwner = posix_getpwuid(fileowner($home));
if (isset($composeUser['name'], $homeOwner['name']) && $composeUser['name'] !== $homeOwner['name']) {<?php private function stripWhitespace($source)
{
if (!function_exists('token_get_all')) {
return $source;
}<?php {
static $shutdownRegistered = false;
if (function_exists('ini_set') && extension_loaded('xdebug')) {
ini_set('xdebug.show_exception_trace', '0');
ini_set('xdebug.scream', '0');
}<?php ini_set('xdebug.scream', '0');
}
if (function_exists('date_default_timezone_set') && function_exists('date_default_timezone_get')) {
date_default_timezone_set(Silencer::call('date_default_timezone_get'));
}<?php }
if (!$shutdownRegistered) {
if (function_exists('pcntl_async_signals') && function_exists('pcntl_signal')) {
pcntl_async_signals(true);
pcntl_signal(SIGINT, function ($sig) {
exit(130);<?php Composer::getVersion(),
Composer::RELEASE_DATE,
defined('HHVM_VERSION') ? 'HHVM '.HHVM_VERSION : 'PHP '.PHP_VERSION,
function_exists('php_uname') ? php_uname('s') . ' / ' . php_uname('r') : 'Unknown OS'
), true, IOInterface::DEBUG);
if (PHP_VERSION_ID < 70205) {<?php if (
!Platform::isWindows()
&& function_exists('exec')
&& !Platform::getEnv('COMPOSER_ALLOW_SUPERUSER')
&& (ini_get('open_basedir') || !file_exists('/.dockerenv'))
) {