classHOGE{publicint$i=0;publicstring$s='';public?object$obj;}$c=newHOGE();$c->i=1;$c->s='string';$c->obj=newstdClass();$c->i='string';// Uncaught TypeError: Typed property HOGE::$i must be int, string used

$square=fn($x)=>$x**2;var_dump($square(2),$square(-5));// 4, 25

$a=1;$hoge=fn()=>++$a;echo$hoge();// 2echo$a;// 1

$a=FFI::new("int[10]");for($i=0;$i<10;$i++){$a[$i]=$i;}$p=FFI::cast("int*",$a);var_dump($p[0]);// 0var_dump($p[2]);// 2

opcache.preload="path\to\preload.php"

// preload_cache.phpをプリロードするopcache_compile_file('path\to\preload_cache.php');

functionh(string$str):string{returnhtmlspecialchars($str,ENT_QUOTES,'UTF-8');}

var_dump(h('a<b>c'));// a&lt;b&gt;cfunctionh(){}// Fatal error: Cannot redeclare h()

$arr=[null,// "hoge"false,// falsetrue,// true'',// ""0,// 0[],// []];foreach($arras$i){$i??='hoge';echo$i;}$x??='hoge';echo$x;// "hoge"$x=$x??'hoge';// これと同じ

var_dump(hash_algos());// ['md2', 'md4', 'md5', …]

var_dump(password_algos());// ['2y', 'argon2i', 'argon2id']

openssl_random_pseudo_bytes(-1);// Fatal error: Uncaught Error: Length must be greater than 0

$x=mb_str_split('aAａＡ1１!！あ𩸽',1);var_export($x);// ['a', 'A', 'ａ', 'Ａ', '1', '１', '!', '！', 'あ', '𩸽']

$x=mb_str_split('がが👨‍👩‍👦‍👦',1);var_export($x);// ['が', 'か', '゙', '👨', '‍', '👩', '‍', '👦', '‍', '👦' ]

$pattern='(.*)*^';$subject='1234567890123456789012345678901234567890';mb_ereg($pattern,$subject,$regs);// false

$ary=[0,1,2];$ref1=&$ary[1];unset($ref1);$ref2=&$ary[2];var_dump(ReflectionReference::fromArrayElement($ary,0));// nullvar_dump(ReflectionReference::fromArrayElement($ary,1));// nullvar_dump(ReflectionReference::fromArrayElement($ary,2));// ReflectionReference

<?phpecho149_597_870_700;// 149597870700echo0x42_72_6F_77_6E;// 0x42726F776Eecho0b01010100_01101000_01100101_01101111;// 0b01010100011010000110010101101111echo1__2;// Parse error: syntax error

classHOGE{publicfunction__toString(){thrownewException('hoge');}}echonewHOGE();// Fatal error: Uncaught Exception: hoge

classBASE{}classEXTENDextendsBASE{}classA{publicfunctionmake(EXTEND$param):BASE{returnnewBASE();}}classBextendsA{/** @Override */publicfunctionmake(BASE$param):EXTEND{returnnewEXTEND();}}(newA())->make(newEXTEND());(newB())->make(newBASE());

$a=[1,2];$b=3;$c=newArrayObject([4,5]);[$a,$b,$c];// [[1, 2], 3, ArrayObject(4, 5)][...$a,$b,...$c];// [1, 2, 3, 4, 5]

$dummy=newstdClass();$wr=WeakReference::create($dummy);$wr->get();// $dummyunset($dummy);$wr->get();// null

classObjectWithReferences{protected$var1;protected$var2;publicfunction__construct(){$this->var1=newStdClass();$this->var2=$this->var1;}}classWrapperObjectimplementsSerializable{private$obj;publicfunction__construct($obj){$this->obj=$obj;}publicfunctiongetObject(){return$this->obj;}publicfunctionserialize(){unserialize(serialize(new\StdClass));// ???returnserialize($this->obj);}publicfunctionunserialize($serialized){$this->obj=unserialize($serialized);}}$wrapper=newWrapperObject(newObjectWithReferences());var_dump($wrapper->getObject());// ObjectWithReferences$wrapper=unserialize(serialize($wrapper));// Notice: unserialize(): Error at offset 82 of 83 bytesvar_dump($wrapper->getObject());// false

classWrapperObject{private$obj;publicfunction__construct($obj){$this->obj=$obj;}publicfunctiongetObject(){return$this->obj;}publicfunction__serialize():array{return(array)$this->obj;}publicfunction__unserialize(array$data){return$this->obj=(object)$data;}}$wrapper=newWrapperObject(newObjectWithReferences());var_dump($wrapper->getObject());ObjectWithReferences$wrapper=unserialize(serialize($wrapper));var_dump($wrapper->getObject());// stdClass

$array=[1=>[2=>[3=>[4=>[5]]]]];$ser=serialize($array);unserialize($ser,[]);// [ 1=>[ 2=>[ 3=>[ 4=>[ 5 ] ] ] ] ]unserialize($ser,['max_depth'=>1]);// false unserialize(): Maximum depth of 1 exceeded

require_once("Auth/Auth.php");// failed to open stream: No such file or directory

$cfile=newCURLFile('https://www.google.com/images/srpr/logo1w.png','image/png','testpic');

filter_var(10.1,FILTER_VALIDATE_FLOAT,['options'=>['min_range'=>1,'max_range'=>10,]]);// false

$img=imagecreatefrompng('image.png');imagefilter($img,IMG_FILTER_SCATTER,3,5);header('Content-Type: image/png');imagepng($img);imagedestroy($img);

imagefilter($img,IMG_FILTER_SCATTER,3,10);// 左imagefilter($img,IMG_FILTER_SCATTER,1,100);// 右

$subject='abcdedcba';$pattern='|.c.|';$callback=function($matches){// 第5引数が無い場合、 $matches = ['bcd'] / ['dcb']// PREG_OFFSET_CAPTUREがある場合、 $matches = ['bcd', 1] / ['dcb', 5]return'';};preg_replace_callback($pattern,$callback,$subject,-1,$count,PREG_OFFSET_CAPTURE);

preg_match('/(A)|(B)|(C)/','B',$matches,PREG_UNMATCHED_AS_NULL);// $matches = ["B", null, "B", null]preg_match('/(A)|(B)|(C)/','B',$matches);// $matches = ["B", "", "B"]

$dsn='mysql:dbname=test;host=127.0.0.1;user=testuser;password=testpass';$pdo=newPDO($dsn);

$sql="SELECT * FROM my_table WHERE my_col ?? 'my_key'";

$str='<a><b><i><u>テキスト</u></i></b></a>';strip_tags($str,['b','u']);// <b><u>テキスト</u></b>

array_merge();// []

$arr=[];array_merge(...$arr);// PHP7.3まではE_WARNING

proc_open(['php','-r','echo "Hello World\n";'],$descriptors,$pipes);

proc_open($cmd,[2=>['redirect',1]],$pipes);// 2>&1proc_open($cmd,[2=>['null']],$pipes);// 2>null

$queue=newSplPriorityQueue();$queue->setExtractFlags(0);// Fatal error: Uncaught RuntimeException: Must specify at least one extract flag$queue->insert('A',1);$queue->top();

echoMB_ONIGURUMA_VERSION;// 6.9.3

$class1=newclass{};var_dump(get_declared_classes());// $class2は入ってない$class2=newclass{};

$img=imagecreatefromtga('image.tga');header('Content-Type: image/png');imagepng($img);imagedestroy($img);

最後に改行がない
<?php

echoPASSWORD_ARGON2ID;// argon2id

$fp=fopen('/path/to/dummy','a');fread($fp,100);// false

newDateInterval('P1D')==newDateInterval('P1D');// Warning: Cannot compare DateInterval objects

$dti=newDateInterval('P1D');$dti2=$dti;var_dump($dti==$dti2,$dti===$dti2);// true, true

$ref=newReflectionClass(newstdClass());serialize($ref);// Serialization of 'ReflectionClass' is not allowed

$arr=newArrayObject([1,2,3]);get_object_vars($arr);// []

classA{public$pub=1;protected$prot=2;private$priv=3;}classBextendsA{private$priv=4;}$obj=newB;$obj->dyn=5;$obj->{"6"}=6;get_mangled_object_vars($obj);// [ ["Bpriv"]=> int(4), ["pub"]=> int(1), ["*prot"]=> int(2), ["Apriv"]=> int(3), ["dyn"]=> int(5), [6]=> int(6) ]get_object_vars($obj); // [ ["pub"]=> int(1), ["dyn"]=> int(5), [6]=> int(6) ]

$xmlstr=<<<XML
<a>
  <bs>
    <b>1</b>
    <b>2</b>
    <b>3</b>
  </bs>
</a>
XML;$xml=newSimpleXMLElement($xmlstr);echocount($xml);// 1echocount($xml->bs);// 1echocount($xml->b);// 3

sapi_windows_set_ctrl_handler(function(int$evt){if($evt===PHP_WINDOWS_EVENT_CTRL_C){echo'Ctrl+C pressed.';exit();}elseif($evt===PHP_WINDOWS_EVENT_CTRL_BREAK){echo'Ctrl+Break pressed.';exit();}else{echo'What pressed???',$evt;}});while(1){usleep(100);}

$crt=<<<CRT
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
CRT;$rightKey=<<<KEY
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDLXp6PkCtbpV+P1gwFQWH6Ez0U
83uEmS8IGnpeI8Fk8rY/vHOZzZZaxRCw+loyc342qCDIQheMOCNm5Fkevz06q757
/oooiLR3yryYGKiKG1IZIiplmtsC95oKrzUSKk60wuI1mbgpMUP5LKi/Tvxes5Pm
kUtXfimz2qgkeUcPpQIDAQAB
-----END PUBLIC KEY-----
KEY;$wrongKey=<<<KEY
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArbUmVW1Y+rJzZRC3DYB0
kdIgvk7MAday78ybGPPDhVlbAb4CjWbaPs4nyUCTEt9KVG0H7pXHxDbWSsC2974z
dvqlP0L2op1/M2SteTcGCBOdwGH2jORVAZL8/WbTOf9IpKAM77oN14scsyOlQBJq
hh+xrLg8ksB2dOos54yDqo0Tq7R5tldV+alKZXWlJnqRCfFuxvqtfWI5nGTAedVZ
hvjQfLQQgujfXHoFWoGbXn2buzfwKGJEeqWPbQOZF/FeOJPlgOBhhDb3BAFNVCtM
3k71Rblj54pNd3yvq152xsgFd0o3s15fuSwZgerUjeEuw/wTK9k7vyp+MrIQHQmP
dQIDAQAB
-----END PUBLIC KEY-----
KEY;openssl_x509_verify($crt,$rightKey);// 1openssl_x509_verify($crt,$wrongKey);// 0openssl_x509_verify($crt,'hoge');// -1

echoidn_to_utf8('xn--2-kq6aw43af1e4y9boczagup');// 中島第2駐輪場

$tokens=token_get_all('<?php '.chr(0));echotoken_name($tokens[1][0]);// T_BAD_CHARACTER

$a=1;$b=2;echo"sum: ".$a+$b;// Deprecated: The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8

1?2:3?4:5;// Deprecated: Unparenthesized `a ? b : c ? d : e` is deprecated.(1?2:3)?4:5;// ok 解釈が一意1?2:(3?4:5);// ok 解釈が一意1?2?3:4:5;// ok 解釈が一意1?:2?:3;// ok 解釈が一意

$string='ABCDEFG';echo$string[1];// Becho$string{2};// Deprecated: Array and string offset access syntax with curly braces is deprecated

$int=1234567980;echo$int[1];// Notice: Trying to access array offset on value of type int$null=null;echo$null[0];// Notice: Trying to access array offset on value of type null

htmlentities('abc',ENT_COMPAT,'Shift_JIS');// htmlentities(): Only basic entities substitution is supported for multi-byte encodings

classDummy{publicfunctionhoge(){returnparent::hoge();}}// Deprecated: Cannot use "parent" when current class scope has no parent

echobcadd("2","3a");// Warning: bcadd(): bcmath function argument is not well-formed

base_convert('012',2,10);// Deprecated: Invalid characters passed for attempted conversion, these have been ignored

is_real(1);// Deprecated: Function is_real() is deprecatedis_float(1);// OK

get_magic_quotes_gpc();// Deprecated: Function get_magic_quotes_gpc() is deprecatedget_magic_quotes_runtime();// Deprecated: Function get_magic_quotes_runtime() is deprecated

array_key_exists(1,newstdClass());// Deprecated: array_key_exists(): Using array_key_exists() on objects is deprecatedarray_key_exists(1,[]);// OK

filter_var('s',\FILTER_SANITIZE_MAGIC_QUOTES);// Deprecated: filter_var(): FILTER_SANITIZE_MAGIC_QUOTES is deprecatedfilter_var('s',\FILTER_SANITIZE_ADD_SLASHES);// OK

ReflectionFunction::export('_');// Deprecated: Function ReflectionFunction::export() is deprecatedechonewReflectionFunction('_');// OK

mb_strrpos('haystack','needle','UTF-8');// Deprecated: mb_strrpos(): Passing the encoding as third parameter is deprecatedmb_strrpos('haystack','needle',0,'UTF-8');// OK

implode([1,2],',');// Deprecated: implode(): Passing glue string after array is deprecatedimplode(',',[1,2]);// OKimplode([1,2]);// OK ','区切りと同じ

(newclass{publicfunctiondummy(){returnfunction(){isset($this);};}})->dummy()->bindTo(null);// Deprecated: Unbinding $this of closure is deprecated

hebrevc('a');// Deprecated: Function hebrevc() is deprecated

convert_cyr_string('str','k','i');// Deprecated: Function convert_cyr_string() is deprecated

money_format('%i',123456789);// Fatal error: Uncaught Error: Call to undefined function money_format()

ezmlm_hash('test@example.com');// Deprecated: Function ezmlm_hash() is deprecated

restore_include_path();// Deprecated: Function restore_include_path() is deprecated

allow_url_include=On