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SQL Server FAQ - PHP MSSQL - Including Text Values in SQL Statements

By: FYIcenter.com

(Continued from previous topic...)

PHP MSSQL - How To Include Text Values in SQL Statements?

Text values in SQL statements should be quoted with single quotes ('). If the text value contains a single quote ('), it should be protected by replacing it with two single quotes (''). In SQL language syntax, two single quotes represents one single quote in string literals.

The tutorial exercise below shows you two INSERT statements. The first one will fail, because it has an un-protected single quote. The second one will be ok, because a str_replace() is used to replace (') with (''):

<?php
  $con = mssql_connect('LOCALHOST','sa','FYIcenter');
  mssql_select_db('FyiCenterData', $con);

  $notes = "It's a search engine!";
  $sql = "INSERT INTO fyi_links (id, url, notes) VALUES ("
      . " 201, 'www.google.com', '".$notes."')";
  if (!mssql_query($sql, $con)) {
    print("SQL statement failed with error:\n");
    print("   ".mssql_get_last_message()."\n");
  } else {
    print("1 rows inserted.\n");
  }

  $notes = "It's another search engine!";
  $notes = str_replace("'", "''", $notes);
  $sql = "INSERT INTO fyi_links (id, url, notes) VALUES ("
      . " 202, 'www.yahoo.com', '".$notes."')";
  if (!mssql_query($sql, $con)) {
    print("SQL statement failed with error:\n");
    print("   ".mssql_get_last_message()."\n");
  } else {
    print("1 rows inserted.\n");
  }
  
  mssql_close($con); 
?>

If you run this script, you will get something like this:

SQL statement failed with error:
   Unclosed quotation mark after the character string ')'.

1 rows inserted.

(Continued on next topic...)

  1. PHP MSSQL - How To Create a New Table?
  2. PHP MSSQL - How To Drop an Existing Table?
  3. PHP MSSQL - How To Insert Data into an Existing Table?
  4. PHP MSSQL - How To Make a Column Nullable?
  5. PHP MSSQL - How To Insert Data with NULL Values?
  6. PHP MSSQL - How To Insert Multiple Rows with a subquery?
  7. PHP MSSQL - How To Get the Number of Affected Rows?
  8. PHP MSSQL - What Is a Result Set Object Returned by mssql_query()?
  9. PHP MSSQL - How To Loop through Returning Rows?
  10. PHP MSSQL - How To Update Existing Rows in a Table?
  11. PHP MSSQL - How To Delete Existing Rows in a Table?
  12. PHP MSSQL - How To Include Text Values in SQL Statements?
  13. PHP MSSQL - How To Include Date and Time Values in SQL Statements?
  14. PHP MSSQL - How To Display a Past Time in Days, Hours and Minutes?
  15. PHP MSSQL - How To Perform Key Word Search in Tables?
  16. PHP MSSQL - How To Query Multiple Tables Jointly?
  17. PHP MSSQL - How To Create an Identity Column?

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