文字列関数<br>

<br>
【addcslashes()】<br>
\abc文字列\n<br><br>
【get_headers()】<br>
array(17) {
  [0]=>
  string(30) "HTTP/1.1 301 Moved Permanently"
  [1]=>
  string(13) "Server: nginx"
  [2]=>
  string(35) "Date: Sun, 14 Jun 2026 05:33:39 GMT"
  [3]=>
  string(43) "Content-Type: text/html; charset=iso-8859-1"
  [4]=>
  string(19) "Content-Length: 232"
  [5]=>
  string(17) "Connection: close"
  [6]=>
  string(34) "Location: https://familymatsu.com/"
  [7]=>
  string(15) "HTTP/1.1 200 OK"
  [8]=>
  string(13) "Server: nginx"
  [9]=>
  string(35) "Date: Sun, 14 Jun 2026 05:33:40 GMT"
  [10]=>
  string(38) "Content-Type: text/html; charset=UTF-8"
  [11]=>
  string(26) "Transfer-Encoding: chunked"
  [12]=>
  string(17) "Connection: close"
  [13]=>
  string(21) "Vary: Accept-Encoding"
  [14]=>
  string(30) "Access-Control-Allow-Origin: *"
  [15]=>
  string(39) "Cross-Origin-Opener-Policy: same-origin"
  [16]=>
  string(42) "Cross-Origin-Embedder-Policy: require-corp"
}
array(17) {
  [0]=>
  string(30) "HTTP/1.1 301 Moved Permanently"
  [1]=>
  string(13) "Server: nginx"
  [2]=>
  string(35) "Date: Sun, 14 Jun 2026 05:33:40 GMT"
  [3]=>
  string(43) "Content-Type: text/html; charset=iso-8859-1"
  [4]=>
  string(19) "Content-Length: 232"
  [5]=>
  string(17) "Connection: close"
  [6]=>
  string(34) "Location: https://familymatsu.com/"
  [7]=>
  string(15) "HTTP/1.1 200 OK"
  [8]=>
  string(13) "Server: nginx"
  [9]=>
  string(35) "Date: Sun, 14 Jun 2026 05:33:40 GMT"
  [10]=>
  string(38) "Content-Type: text/html; charset=UTF-8"
  [11]=>
  string(26) "Transfer-Encoding: chunked"
  [12]=>
  string(17) "Connection: close"
  [13]=>
  string(21) "Vary: Accept-Encoding"
  [14]=>
  string(30) "Access-Control-Allow-Origin: *"
  [15]=>
  string(39) "Cross-Origin-Opener-Policy: same-origin"
  [16]=>
  string(42) "Cross-Origin-Embedder-Policy: require-corp"
}
bool(true)
<br>
【get_meta_tags()】<br>
array(1) {
  ["viewport"]=>
  string(37) "width=device-width, initial-scale=1.0"
}
<br>
【http_build_query()】<br>
string(23) "name=yamada+taro&age=36"
<br>
【parse_str()】　第2引数に結果を格納する変数を指定するのは、PHP8から必須になった。<br>
array(4) {
  ["name"]=>
  string(11) "yamada taro"
  ["age"]=>
  string(2) "36"
  ["child"]=>
  array(1) {
    [0]=>
    string(6) "hanako"
  }
  ["child_name"]=>
  array(1) {
    [0]=>
    string(6) "tamako"
  }
}
<br>	
【ctype_alnum()】<br>
bool(true)
<br>
【ctype_print()】<br>
bool(false)
bool(false)