Lasso Professional 5 Developer's Guide

Contents......Page 6
Foreword......Page 10
Introduction......Page 12
Basic Syntax......Page 14
Testing Your Scripts......Page 15
Sending Text to the Browser......Page 16
Sending Data to the Browser......Page 18
Sending HTML to the Browser......Page 19
Using White Space in Lasso (and HTML)......Page 21
Adding Comments to Your Scripts......Page 23
Using JavaScript with Lasso......Page 26
Variable Syntax......Page 30
Local Variables......Page 31
Assigning Values to Variables......Page 32
Creating a Simple Form......Page 38
Using GET or POST......Page 41
Receiving Data from a Form in Lasso......Page 42
Using Hidden Fields......Page 48
The [If]...[/If] Conditional......Page 52
More Operators......Page 55
Using [Else]......Page 57
Using [While]...[/While]......Page 62
Using [Loop]...[/Loop]......Page 65
Trimming Strings......Page 72
Connecting Strings (Concatenation)......Page 73
Encoding and Decoding Strings......Page 78
Encrypting and Decrypting Strings......Page 85
Exploiting Strings......Page 91
Adding, Subtracting, Multiplying, and Dividing......Page 94
Incrementing and Decrementing a Number......Page 99
Using Multiple Operators......Page 100
Using Built-in Mathematical Functions......Page 107
Formatting Numbers......Page 109
Creating an Array......Page 110
Adding and Removing Items in an Array......Page 112
Accessing Array Elements......Page 113
Sorting Arrays......Page 119
Creating an Array from a Form......Page 120
Using Maps......Page 127
Using Arrays and Maps Together......Page 129
File Permissions......Page 140
Creating and Writing to Files......Page 146
Reading from Files......Page 154
Browsing Directories......Page 163
Uploading Files......Page 175
Renaming and Deleting Files and Directories......Page 182
Databases and Lasso......Page 186
Connecting to a Database......Page 188
Lasso MySQL — Creating a Database......Page 189
Lasso MySQL — Creating a Table......Page 192
Lasso MySQL — Creating a Field......Page 195
Using -Add......Page 204
Using -Findall and -Search......Page 207
Using -Update......Page 213
Using -Delete......Page 215
Using -SQL......Page 217
Creating Sessions......Page 228
Sessions with Forms......Page 231
Adding Variables to a Session......Page 235
Deleting a Session......Page 236
Using Sessions with Cookies......Page 244
Using Include and Library......Page 250
Determining Date and Time......Page 252
Using HTTP Headers......Page 266
Sending Email......Page 270
Optional Parameters......Page 271
Common Errors......Page 280
Error Reporting......Page 286
Debugging Detective Work......Page 293
Using Logs......Page 294
Regular Expressions......Page 298
Creating and Using Custom Tags......Page 305
Creating and Using LassoApps......Page 311
Setting up the Administration Panel......Page 316
Datasources......Page 318
Group Permissions......Page 323
File Permissions......Page 329
General Permissions......Page 330
Appendix A Lasso Tag Syntax Reference......Page 332
Appendix B Error Code Reference......Page 455
Appendix C Quick Table Reference......Page 464
Appendix D Example Application MyResume......Page 472
Appendix E Lasso Resources......Page 478
Index......Page 482