500 Error output during program debugging

For help, I found that no display was found during debugging. After reviewing the elements, I found the installation package provided by lnmp.org in the 500 Error environment, the php version is 5.6mysql. Through the probe test, all the codes listed below can be connected. Please help me to analyze what went wrong and how to modify the address h... for help, I found no display during debugging after writing, and found Error 500 after review elements
The installation package provided by lnmp.org for the environment. The php version is 5.6.
Mysql can be connected through the probe test
The following lists all the codes. Please help me analyze what went wrong and how to modify them.
Address is http://test.ni-co.moe/sousuo.php

Main query output files of mysql. php

  Connect_error) {die ("bad login :". $ conn-> connect_error) ;}; echo "mysql login good"; $ cx = 'select * from test where find_in_set ($ sousuo, name )'; $ dc = $ conn-> query ($ cx); echo $ dc; $ row = mysql_fetch_assoc (mysql_query ($ cx); // obtain the row echo $ row through the result set; foreach ($ row as $ key => $ value) {$ new ['P '. $ key] = $ value; // before the variable name, batch + p, an array} extract ($ new ); // Add the array index as the variable name to the symbol table echo $ row + "/" + $ new; echo "pid:" + $ puid +"
Host: "+ $ puser +"
Pwd: "+ $ fpwd; // :)?>

Sousuo. php submits forms for users

  Submit information
  

Conifg. php is mysql Information

The cache is disabled in huancun. php.

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For help, I found no display during debugging after writing, and found Error 500 after review elements
The installation package provided by lnmp.org for the environment. The php version is 5.6.
Mysql can be connected through the probe test
The following lists all the codes. Please help me analyze what went wrong and how to modify them.
Address is http://test.ni-co.moe/sousuo.php

Main query output files of mysql. php

  Connect_error) {die ("bad login :". $ conn-> connect_error) ;}; echo "mysql login good"; $ cx = 'select * from test where find_in_set ($ sousuo, name )'; $ dc = $ conn-> query ($ cx); echo $ dc; $ row = mysql_fetch_assoc (mysql_query ($ cx); // obtain the row echo $ row through the result set; foreach ($ row as $ key => $ value) {$ new ['P '. $ key] = $ value; // before the variable name, batch + p, an array} extract ($ new ); // Add the array index as the variable name to the symbol table echo $ row + "/" + $ new; echo "pid:" + $ puid +"
Host: "+ $ puser +"
Pwd: "+ $ fpwd; // :)?>

Sousuo. php submits forms for users

  Submit information
  

Conifg. php is mysql Information

The cache is disabled in huancun. php.

Your 500 error is obviously a program error. The web server reports a code error.

Id = the part of the body is wider than the part of the head.

You can view the error log ~