The best place to *find* answers to programming/development questions, imo, however it's the *worst* place to *ask* questions (if your first question/comment doesn't get any up-rating/response, then u can't ask anymore questions--ridiculously unrealistic), but again, a great reference for *finding* answers.

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php add conditional html tag parameter: example how to avoid having to escape quotes w complex (curly) variable parsing syntax

i have a php/html application where i want to add a conditional html tag "title" attribute if a value for "email" exists.

the trouble people usually run into is the escaping of single and/or double quotes, but if u use php's "complex (curly) variable parsing syntax", then u don't have to escape any quotes at all (generally):

<a href="#" <? if($this->data['email'] != '') echo " title='{$this->data['email']}'" ?>>Email</a>

so if "email" is set, then the rendered output for the tag will look like this:
<a href="#" title=''>Email</a>

the "title" attribute will most likely be rendered with double quotes (""), not single (''), but for purposes of illustration, i'm showing u the relationship between the php code and the rendered output.

fyi, the "simple syntax" way is like this:
<a href="#" <? if($this->data['email'] != '') echo ' title="'.$this->data['email'].'"' ?>>Email</a>

(gives identical output as "complex" syntax)


ckeditor how to add custom icon button image to toolbar: CKEDITOR.getUrl()

i've built a custom ckeditor toolbar dropdown menu, but i was struggling to find out how to add a custom pilcrow icon for the dropdown, until i found this:

so here's how i got it to work:

editor.ui.add( 'MyParagraphDropdown', CKEDITOR.UI_MENUBUTTON, {
    label: 'Paragraph styling',
    icon: CKEDITOR.getUrl('../../images/pilcrow.png'),
    onMenu: function() {
        var active = {};
        // Make all items active.        
        for ( var p in items )
            active[ p ] = CKEDITOR.TRISTATE_OFF;

        return active;
} );

here's the pilcrow ( ¶ ) glyph icon button image i created (png w transparent background); 16x16 (font color [dark grey]: 494949):

and here's what it looks like in the ckeditor toolbar:


how to escape tag name in document selector inside javascript onclick return confirm which also contains php values

i wanted to display another tag value inside an onclick return confirm message that also contained php code, so it was a challenge to figure out how to escape all the single quote and double quotes variables. this one gave me a run for my money, but here's the example code that finally works:

<input type="text" name="newString">
<button type="submit" onclick="return confirm('Change [ <?= $this->oldString ?> ] to [ '+document.getElementsByName('newString')[0].value+' ]?')">change string</button>